Enviar pesquisa
Carregar
04 lecture presentation
•
Transferir como PPTX, PDF
•
0 gostou
•
869 visualizações
G
Gian Romano
Seguir
h
Leia menos
Leia mais
Educação
Denunciar
Compartilhar
Denunciar
Compartilhar
1 de 145
Baixar agora
Recomendados
Part 1
Part 1
Gian Romano
Cellular processes
Cellular processes
ttkimbrown1
Cell Processes
Cell Processes
Dwayne Squires
IB Biology 1.5 Slides: Origins of Cells
IB Biology 1.5 Slides: Origins of Cells
Jacob Cedarbaum
Unit 1 Living organisms
Unit 1 Living organisms
Mónica
1.5 origin of the cells
1.5 origin of the cells
Bob Smullen
IB Topic 1.5 Cell Origins
IB Topic 1.5 Cell Origins
Eran Earland
Cell processes
Cell processes
ECSD
Recomendados
Part 1
Part 1
Gian Romano
Cellular processes
Cellular processes
ttkimbrown1
Cell Processes
Cell Processes
Dwayne Squires
IB Biology 1.5 Slides: Origins of Cells
IB Biology 1.5 Slides: Origins of Cells
Jacob Cedarbaum
Unit 1 Living organisms
Unit 1 Living organisms
Mónica
1.5 origin of the cells
1.5 origin of the cells
Bob Smullen
IB Topic 1.5 Cell Origins
IB Topic 1.5 Cell Origins
Eran Earland
Cell processes
Cell processes
ECSD
Cell Biology Introduction
Cell Biology Introduction
Shaina Mavreen Villaroza
1.1 introduction to the cell
1.1 introduction to the cell
Bob Smullen
Lecture notes cell biology
Lecture notes cell biology
Michael Ho
Cells and Cellular Processes
Cells and Cellular Processes
Eneutron
DP Bio Topic 1-4 Membrane Transport
DP Bio Topic 1-4 Membrane Transport
R. Price
Ch. 4 Cell Structures
Ch. 4 Cell Structures
watsonma12
A level Biology - Cells, Viruses and Reproduction of Living Things
A level Biology - Cells, Viruses and Reproduction of Living Things
mrexham
Chapter 3 cells and tissues
Chapter 3 cells and tissues
mpattani
1 cell biology syllabus statements
1 cell biology syllabus statements
cartlidge
1.2 Obj Notes and Practice
1.2 Obj Notes and Practice
Eran Earland
Chapter 4 Notes
Chapter 4 Notes
guest20c20a
The Cell (PPT from Mrs. Brenda Lee)
The Cell (PPT from Mrs. Brenda Lee)
Carla
ppt on introduction to biochemistry and cell
ppt on introduction to biochemistry and cell
ASIF IQBAL KHAN
Origin of biomolecules.. sairam
Origin of biomolecules.. sairam
Sai Ram
Chapter 5 Cell Transport
Chapter 5 Cell Transport
watsonma12
Chapter1 themes
Chapter1 themes
fauziputratata
1 chapter themes
1 chapter themes
Lintang Nirasmara
Chapter 3 Notes: Cell Processes
Chapter 3 Notes: Cell Processes
Mr. Motuk
04 chapter
04 chapter
Dwayne Squires
Biochemistry mc qs
Biochemistry mc qs
Harshraj Shinde
Commong good, subsidiarity, solidarity & love
Commong good, subsidiarity, solidarity & love
Gian Romano
Hierarchy of church documents
Hierarchy of church documents
Gian Romano
Mais conteúdo relacionado
Mais procurados
Cell Biology Introduction
Cell Biology Introduction
Shaina Mavreen Villaroza
1.1 introduction to the cell
1.1 introduction to the cell
Bob Smullen
Lecture notes cell biology
Lecture notes cell biology
Michael Ho
Cells and Cellular Processes
Cells and Cellular Processes
Eneutron
DP Bio Topic 1-4 Membrane Transport
DP Bio Topic 1-4 Membrane Transport
R. Price
Ch. 4 Cell Structures
Ch. 4 Cell Structures
watsonma12
A level Biology - Cells, Viruses and Reproduction of Living Things
A level Biology - Cells, Viruses and Reproduction of Living Things
mrexham
Chapter 3 cells and tissues
Chapter 3 cells and tissues
mpattani
1 cell biology syllabus statements
1 cell biology syllabus statements
cartlidge
1.2 Obj Notes and Practice
1.2 Obj Notes and Practice
Eran Earland
Chapter 4 Notes
Chapter 4 Notes
guest20c20a
The Cell (PPT from Mrs. Brenda Lee)
The Cell (PPT from Mrs. Brenda Lee)
Carla
ppt on introduction to biochemistry and cell
ppt on introduction to biochemistry and cell
ASIF IQBAL KHAN
Origin of biomolecules.. sairam
Origin of biomolecules.. sairam
Sai Ram
Chapter 5 Cell Transport
Chapter 5 Cell Transport
watsonma12
Chapter1 themes
Chapter1 themes
fauziputratata
1 chapter themes
1 chapter themes
Lintang Nirasmara
Chapter 3 Notes: Cell Processes
Chapter 3 Notes: Cell Processes
Mr. Motuk
04 chapter
04 chapter
Dwayne Squires
Biochemistry mc qs
Biochemistry mc qs
Harshraj Shinde
Mais procurados
(20)
Cell Biology Introduction
Cell Biology Introduction
1.1 introduction to the cell
1.1 introduction to the cell
Lecture notes cell biology
Lecture notes cell biology
Cells and Cellular Processes
Cells and Cellular Processes
DP Bio Topic 1-4 Membrane Transport
DP Bio Topic 1-4 Membrane Transport
Ch. 4 Cell Structures
Ch. 4 Cell Structures
A level Biology - Cells, Viruses and Reproduction of Living Things
A level Biology - Cells, Viruses and Reproduction of Living Things
Chapter 3 cells and tissues
Chapter 3 cells and tissues
1 cell biology syllabus statements
1 cell biology syllabus statements
1.2 Obj Notes and Practice
1.2 Obj Notes and Practice
Chapter 4 Notes
Chapter 4 Notes
The Cell (PPT from Mrs. Brenda Lee)
The Cell (PPT from Mrs. Brenda Lee)
ppt on introduction to biochemistry and cell
ppt on introduction to biochemistry and cell
Origin of biomolecules.. sairam
Origin of biomolecules.. sairam
Chapter 5 Cell Transport
Chapter 5 Cell Transport
Chapter1 themes
Chapter1 themes
1 chapter themes
1 chapter themes
Chapter 3 Notes: Cell Processes
Chapter 3 Notes: Cell Processes
04 chapter
04 chapter
Biochemistry mc qs
Biochemistry mc qs
Destaque
Commong good, subsidiarity, solidarity & love
Commong good, subsidiarity, solidarity & love
Gian Romano
Hierarchy of church documents
Hierarchy of church documents
Gian Romano
Ejercicio de anualidades resueltos
Ejercicio de anualidades resueltos
edgladysmora
Bankruptcy And Your House – Essential Facts
Bankruptcy And Your House – Essential Facts
nichollsco
การให้ยารับประทาน และยาทาภายนอกแก่ผู้ป่วย
การให้ยารับประทาน และยาทาภายนอกแก่ผู้ป่วย
Nakhon Pathom Rajabhat University
Daftar isi
Daftar isi
ronnivaslah
Rev kerangka konseptual
Rev kerangka konseptual
AGUS SETIYONO
Biology in Focus - Chapter 43
Biology in Focus - Chapter 43
mpattani
Classification of Plants and Animals By SYED AASIM HAQ
Classification of Plants and Animals By SYED AASIM HAQ
SYED ASSIM HAQ
Teoría del verbo
Teoría del verbo
novela2017
[Slideshare] tafaqqahu-#6-(january-2017)-lesson-#1g -‘muslim’s education'-key...
[Slideshare] tafaqqahu-#6-(january-2017)-lesson-#1g -‘muslim’s education'-key...
Zhulkeflee Ismail
Destaque
(11)
Commong good, subsidiarity, solidarity & love
Commong good, subsidiarity, solidarity & love
Hierarchy of church documents
Hierarchy of church documents
Ejercicio de anualidades resueltos
Ejercicio de anualidades resueltos
Bankruptcy And Your House – Essential Facts
Bankruptcy And Your House – Essential Facts
การให้ยารับประทาน และยาทาภายนอกแก่ผู้ป่วย
การให้ยารับประทาน และยาทาภายนอกแก่ผู้ป่วย
Daftar isi
Daftar isi
Rev kerangka konseptual
Rev kerangka konseptual
Biology in Focus - Chapter 43
Biology in Focus - Chapter 43
Classification of Plants and Animals By SYED AASIM HAQ
Classification of Plants and Animals By SYED AASIM HAQ
Teoría del verbo
Teoría del verbo
[Slideshare] tafaqqahu-#6-(january-2017)-lesson-#1g -‘muslim’s education'-key...
[Slideshare] tafaqqahu-#6-(january-2017)-lesson-#1g -‘muslim’s education'-key...
Semelhante a 04 lecture presentation
Cell - Fundemental Unit of Life - MBBS.pptx
Cell - Fundemental Unit of Life - MBBS.pptx
Mathew Joseph
Chapter :Tour of cell ,structure and function of parts
Chapter :Tour of cell ,structure and function of parts
nowsheranss185151
Eukaryotic cell Prokaryotic cell.ppt
Eukaryotic cell Prokaryotic cell.ppt
ssuserd6eb7f
Chapter 4 Notes
Chapter 4 Notes
petersbiology
Chapter4 sections+1 7
Chapter4 sections+1 7
bigdanny
Chapter4 sections+1 7
Chapter4 sections+1 7
bigdanny
ch04lecture.ppt
ch04lecture.ppt
AmanPathak602676
Cell structure c&m c 7
Cell structure c&m c 7
Maryfurg
MORPHOLOGY-AND-CLASSIFICATION-OF-BACTERIA(1)-1.pptx
MORPHOLOGY-AND-CLASSIFICATION-OF-BACTERIA(1)-1.pptx
Miladahmed9
Cell Notes
Cell Notes
dean dundas
04 lecture presentation
04 lecture presentation
currie538
Chapter6 Ap Bionotes A Tour Of The Cell
Chapter6 Ap Bionotes A Tour Of The Cell
Hyde Park
Cellular structure and function
Cellular structure and function
jmorgan80
MORPHOLOGY-AND-CLASSIFICATION-OF-BACTERI(1).pptx
MORPHOLOGY-AND-CLASSIFICATION-OF-BACTERI(1).pptx
Miladahmed9
06 Lecture BIOL 1010-30 Gillette College
06 Lecture BIOL 1010-30 Gillette College
deskam2
ultrastructure_cell_prokaryotic_eukaryoticpptx
ultrastructure_cell_prokaryotic_eukaryoticpptx
SanghamitraMohapatra5
The Cell
The Cell
mikeu74
BIO120Concepts of BiologyUnit 2 Lecture Part One Cel.docx
BIO120Concepts of BiologyUnit 2 Lecture Part One Cel.docx
tangyechloe
06 lecture presentation
06 lecture presentation
Yazeed Samara
Biology chapter 1 cell structure and organisation
Biology chapter 1 cell structure and organisation
SYEDA UROOJ
Semelhante a 04 lecture presentation
(20)
Cell - Fundemental Unit of Life - MBBS.pptx
Cell - Fundemental Unit of Life - MBBS.pptx
Chapter :Tour of cell ,structure and function of parts
Chapter :Tour of cell ,structure and function of parts
Eukaryotic cell Prokaryotic cell.ppt
Eukaryotic cell Prokaryotic cell.ppt
Chapter 4 Notes
Chapter 4 Notes
Chapter4 sections+1 7
Chapter4 sections+1 7
Chapter4 sections+1 7
Chapter4 sections+1 7
ch04lecture.ppt
ch04lecture.ppt
Cell structure c&m c 7
Cell structure c&m c 7
MORPHOLOGY-AND-CLASSIFICATION-OF-BACTERIA(1)-1.pptx
MORPHOLOGY-AND-CLASSIFICATION-OF-BACTERIA(1)-1.pptx
Cell Notes
Cell Notes
04 lecture presentation
04 lecture presentation
Chapter6 Ap Bionotes A Tour Of The Cell
Chapter6 Ap Bionotes A Tour Of The Cell
Cellular structure and function
Cellular structure and function
MORPHOLOGY-AND-CLASSIFICATION-OF-BACTERI(1).pptx
MORPHOLOGY-AND-CLASSIFICATION-OF-BACTERI(1).pptx
06 Lecture BIOL 1010-30 Gillette College
06 Lecture BIOL 1010-30 Gillette College
ultrastructure_cell_prokaryotic_eukaryoticpptx
ultrastructure_cell_prokaryotic_eukaryoticpptx
The Cell
The Cell
BIO120Concepts of BiologyUnit 2 Lecture Part One Cel.docx
BIO120Concepts of BiologyUnit 2 Lecture Part One Cel.docx
06 lecture presentation
06 lecture presentation
Biology chapter 1 cell structure and organisation
Biology chapter 1 cell structure and organisation
Mais de Gian Romano
26 lecture_presentation
26 lecture_presentation
Gian Romano
Endocrine system-outline-of-major-players1556
Endocrine system-outline-of-major-players1556
Gian Romano
14 excretory system
14 excretory system
Gian Romano
Reporting southeast asia
Reporting southeast asia
Gian Romano
Fundamental principles-3
Fundamental principles-3
Gian Romano
West asia pdf (1)
West asia pdf (1)
Gian Romano
Part 2
Part 2
Gian Romano
Es 14e lecture_ch03
Es 14e lecture_ch03
Gian Romano
Es 14e lecture_ch04
Es 14e lecture_ch04
Gian Romano
Es 14e lecture_ch02
Es 14e lecture_ch02
Gian Romano
Obe english 3 final (doe copy)
Obe english 3 final (doe copy)
Gian Romano
The language of academic writing
The language of academic writing
Gian Romano
Conciseness lesson
Conciseness lesson
Gian Romano
Conciseness lesson
Conciseness lesson
Gian Romano
The life of rizal
The life of rizal
Gian Romano
19th century
19th century
Gian Romano
Prelude of the coming of the europeans
Prelude of the coming of the europeans
Gian Romano
Native revolts against spain
Native revolts against spain
Gian Romano
Mais de Gian Romano
(18)
26 lecture_presentation
26 lecture_presentation
Endocrine system-outline-of-major-players1556
Endocrine system-outline-of-major-players1556
14 excretory system
14 excretory system
Reporting southeast asia
Reporting southeast asia
Fundamental principles-3
Fundamental principles-3
West asia pdf (1)
West asia pdf (1)
Part 2
Part 2
Es 14e lecture_ch03
Es 14e lecture_ch03
Es 14e lecture_ch04
Es 14e lecture_ch04
Es 14e lecture_ch02
Es 14e lecture_ch02
Obe english 3 final (doe copy)
Obe english 3 final (doe copy)
The language of academic writing
The language of academic writing
Conciseness lesson
Conciseness lesson
Conciseness lesson
Conciseness lesson
The life of rizal
The life of rizal
19th century
19th century
Prelude of the coming of the europeans
Prelude of the coming of the europeans
Native revolts against spain
Native revolts against spain
Último
Influencing policy (training slides from Fast Track Impact)
Influencing policy (training slides from Fast Track Impact)
Mark Reed
GRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTS
GRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTS
JoshuaGantuangco2
Active Learning Strategies (in short ALS).pdf
Active Learning Strategies (in short ALS).pdf
Patidar M
How to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERP
Celine George
Expanded definition: technical and operational
Expanded definition: technical and operational
ssuser3e220a
Millenials and Fillennials (Ethical Challenge and Responses).pptx
Millenials and Fillennials (Ethical Challenge and Responses).pptx
JanEmmanBrigoli
Karra SKD Conference Presentation Revised.pptx
Karra SKD Conference Presentation Revised.pptx
AshokKarra1
Paradigm shift in nursing research by RS MEHTA
Paradigm shift in nursing research by RS MEHTA
BP KOIRALA INSTITUTE OF HELATH SCIENCS,, NEPAL
Q4-PPT-Music9_Lesson-1-Romantic-Opera.pptx
Q4-PPT-Music9_Lesson-1-Romantic-Opera.pptx
lancelewisportillo
Measures of Position DECILES for ungrouped data
Measures of Position DECILES for ungrouped data
BabyAnnMotar
4.16.24 21st Century Movements for Black Lives.pptx
4.16.24 21st Century Movements for Black Lives.pptx
mary850239
Dust Of Snow By Robert Frost Class-X English CBSE
Dust Of Snow By Robert Frost Class-X English CBSE
aurabinda banchhor
MULTIDISCIPLINRY NATURE OF THE ENVIRONMENTAL STUDIES.pptx
MULTIDISCIPLINRY NATURE OF THE ENVIRONMENTAL STUDIES.pptx
Anupkumar Sharma
Daily Lesson Plan in Mathematics Quarter 4
Daily Lesson Plan in Mathematics Quarter 4
JOYLYNSAMANIEGO
4.18.24 Movement Legacies, Reflection, and Review.pptx
4.18.24 Movement Legacies, Reflection, and Review.pptx
mary850239
4.16.24 Poverty and Precarity--Desmond.pptx
4.16.24 Poverty and Precarity--Desmond.pptx
mary850239
HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...
HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...
Nguyen Thanh Tu Collection
LEFT_ON_C'N_ PRELIMS_EL_DORADO_2024.pptx
LEFT_ON_C'N_ PRELIMS_EL_DORADO_2024.pptx
Conquiztadors- the Quiz Society of Sri Venkateswara College
Student Profile Sample - We help schools to connect the data they have, with ...
Student Profile Sample - We help schools to connect the data they have, with ...
Seán Kennedy
YOUVE GOT EMAIL_FINALS_EL_DORADO_2024.pptx
YOUVE GOT EMAIL_FINALS_EL_DORADO_2024.pptx
Conquiztadors- the Quiz Society of Sri Venkateswara College
Último
(20)
Influencing policy (training slides from Fast Track Impact)
Influencing policy (training slides from Fast Track Impact)
GRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTS
GRADE 4 - SUMMATIVE TEST QUARTER 4 ALL SUBJECTS
Active Learning Strategies (in short ALS).pdf
Active Learning Strategies (in short ALS).pdf
How to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERP
Expanded definition: technical and operational
Expanded definition: technical and operational
Millenials and Fillennials (Ethical Challenge and Responses).pptx
Millenials and Fillennials (Ethical Challenge and Responses).pptx
Karra SKD Conference Presentation Revised.pptx
Karra SKD Conference Presentation Revised.pptx
Paradigm shift in nursing research by RS MEHTA
Paradigm shift in nursing research by RS MEHTA
Q4-PPT-Music9_Lesson-1-Romantic-Opera.pptx
Q4-PPT-Music9_Lesson-1-Romantic-Opera.pptx
Measures of Position DECILES for ungrouped data
Measures of Position DECILES for ungrouped data
4.16.24 21st Century Movements for Black Lives.pptx
4.16.24 21st Century Movements for Black Lives.pptx
Dust Of Snow By Robert Frost Class-X English CBSE
Dust Of Snow By Robert Frost Class-X English CBSE
MULTIDISCIPLINRY NATURE OF THE ENVIRONMENTAL STUDIES.pptx
MULTIDISCIPLINRY NATURE OF THE ENVIRONMENTAL STUDIES.pptx
Daily Lesson Plan in Mathematics Quarter 4
Daily Lesson Plan in Mathematics Quarter 4
4.18.24 Movement Legacies, Reflection, and Review.pptx
4.18.24 Movement Legacies, Reflection, and Review.pptx
4.16.24 Poverty and Precarity--Desmond.pptx
4.16.24 Poverty and Precarity--Desmond.pptx
HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...
HỌC TỐT TIẾNG ANH 11 THEO CHƯƠNG TRÌNH GLOBAL SUCCESS ĐÁP ÁN CHI TIẾT - CẢ NĂ...
LEFT_ON_C'N_ PRELIMS_EL_DORADO_2024.pptx
LEFT_ON_C'N_ PRELIMS_EL_DORADO_2024.pptx
Student Profile Sample - We help schools to connect the data they have, with ...
Student Profile Sample - We help schools to connect the data they have, with ...
YOUVE GOT EMAIL_FINALS_EL_DORADO_2024.pptx
YOUVE GOT EMAIL_FINALS_EL_DORADO_2024.pptx
04 lecture presentation
1.
PowerPoint Lectures Campbell Biology:
Concepts & Connections, 8th Edition, Global Edition REECE • TAYLOR • SIMON • DICKEY • HOGAN Lecture by Edward J. Zalisko Chapter 4 A Tour of the Cell © 2016 Pearson Education, Ltd.
2.
Introduction • Cells have
a cytoskeleton that • provides support and • allows some cells to crawl and others to swim. • Our understanding of nature often goes hand in hand with the invention and refinement of instruments that extend our senses. © 2016 Pearson Education, Ltd.
3.
Introduction • In 1665,
Hooke examined a piece of cork under a crude microscope and identified “little rooms” as cells. • Leeuwenhoek, working at about the same time, used more refined lenses to describe living cells from blood, sperm, and pond water. • Since the days of Hooke and Leeuwenhoek, improved microscopes have vastly expanded our view of the cell. © 2016 Pearson Education, Ltd.
4.
Figure 4.0-1 © 2016
Pearson Education, Ltd.
5.
Figure 4.0-2 Introduction to
the Cell Chapter 4: Big Ideas The Nucleus and Ribosomes The Endomembrane System Energy-Converting Organelles The Cytoskeleton and Cell Surfaces © 2016 Pearson Education, Ltd.
6.
INTRODUCTION TO THE
CELL © 2016 Pearson Education, Ltd.
7.
4.1 Microscopes reveal
the world of the cell • A variety of microscopes have been developed for a clearer view of cells and cellular structure. • The first microscopes were light microscopes. In a light microscope (LM), visible light passes through a specimen, then through glass lenses, and finally is projected into the viewer’s eye. • Specimens can be magnified by up to 1,000 times. © 2016 Pearson Education, Ltd.
8.
4.1 Microscopes reveal
the world of the cell • Magnification is the increase in an object’s image size compared with its actual size. • Resolution is a measure of the clarity of an image. In other words, it is the ability of an instrument to show two nearby objects as separate. © 2016 Pearson Education, Ltd.
9.
4.1 Microscopes reveal
the world of the cell • Microscopes have limitations. • The human eye and the microscope have limits of resolution—the ability to distinguish between small structures. • Therefore, the light microscope cannot provide the details of a small cell’s structure. © 2016 Pearson Education, Ltd.
10.
4.1 Microscopes reveal
the world of the cell • Using light microscopes, scientists studied • microorganisms, • animal and plant cells, and • some structures within cells. • In the 1800s, these studies led to cell theory, which states that • all living things are composed of cells and • all cells come from other cells. © 2016 Pearson Education, Ltd.
11.
Figure 4.1a © 2016
Pearson Education, Ltd.
12.
Figure 4.1b © 2016
Pearson Education, Ltd.
13.
Figure 4.1c © 2016
Pearson Education, Ltd.
14.
Figure 4.1d © 2016
Pearson Education, Ltd.
15.
Figure 4.1e-0 Human height Length
of some nerve and muscle cells Chicken egg Frog egg Paramecium Human egg Most plant and animal cells Nucleus Most bacteria Mitochondrion Smallest bacteria Viruses Ribosome Proteins Lipids Small molecules Atoms Unaidedeye Lightmicroscope Electronmicroscope 10 m 1 m 100 mm (10 cm) 10 mm (1 cm) 1 mm 100 nm 10 nm 1 nm 0.1 nm 100 μm 10 μm 1 μm © 2016 Pearson Education, Ltd.
16.
Figure 4.1e-1 Human height Length
of some nerve and muscle cells Chicken egg Frog egg Paramecium Human egg Unaidedeye 10 m 1 m 100 mm (10 cm) 10 mm (1 cm) 1 mm 100 μm © 2016 Pearson Education, Ltd.
17.
Figure 4.1e-2 Frog egg Paramecium Human
egg Most plant and animal cells Nucleus Most bacteria Mitochondrion Smallest bacteria Viruses Ribosome Proteins Lipids Small molecules Atoms Lightmicroscope Electronmicroscope 1 mm 100 nm 10 nm 1 nm 0.1 nm 100 μm 10 μm 1 μm © 2016 Pearson Education, Ltd.
18.
4.1 Microscopes reveal
the world of the cell • Beginning in the 1950s, scientists started using a very powerful microscope called the electron microscope (EM) to view the ultrastructure of cells. • Instead of light, EM uses a beam of electrons. • Electron microscopes can • resolve biological structures as small as 2 nanometers and • magnify up to 100,000 times. © 2016 Pearson Education, Ltd.
19.
4.1 Microscopes reveal
the world of the cell • Scanning electron microscopes (SEMs) study the detailed architecture of cell surfaces. • Transmission electron microscopes (TEMs) study the details of internal cell structure. • Differential interference light microscopes amplify differences in density so that structures in living cells appear almost three-dimensional. © 2016 Pearson Education, Ltd.
20.
4.2 The small
size of cells relates to the need to exchange materials across the plasma membrane • Cell size must • be large enough to house DNA, proteins, and structures needed to survive and reproduce, but • remain small enough to allow for a surface-to- volume ratio that will allow adequate exchange with the environment. © 2016 Pearson Education, Ltd.
21.
Figure 4.2a Total volume 3 3 1 1 2
6 Total surface area Surface-to- volume ratio 27 units3 27 units3 54 units2 162 units2 © 2016 Pearson Education, Ltd.
22.
4.2 The small
size of cells relates to the need to exchange materials across the plasma membrane • The plasma membrane forms a flexible boundary between the living cell and its surroundings. • Phospholipids form a two-layer sheet called a phospholipid bilayer in which • hydrophilic heads face outward, exposed to water, and • hydrophobic tails point inward, shielded from water. © 2016 Pearson Education, Ltd.
23.
4.2 The small
size of cells relates to the need to exchange materials across the plasma membrane • Membrane proteins are embedded in the lipid bilayer. • Some proteins form channels (tunnels) that shield ions and other hydrophilic molecules as they pass through the hydrophobic center of the membrane. • Other proteins serve as pumps, using energy to actively transport molecules into or out of the cell. © 2016 Pearson Education, Ltd.
24.
Figure 4.2b Outside cell Inside
cell Hydrophilic heads Hydrophobic tails Phospholipid Channel protein Hydrophilic regions of a protein Hydrophobic regions of a protein © 2016 Pearson Education, Ltd.
25.
Figure 4.UN01 © 2016
Pearson Education, Ltd.
26.
4.3 Prokaryotic cells
are structurally simpler than eukaryotic cells • Bacteria and archaea are prokaryotic cells. • All other forms of life are composed of eukaryotic cells. • Eukaryotic cells are distinguished by having • a membrane-enclosed nucleus and • many membrane-enclosed organelles that perform specific functions. • Prokaryotic cells are smaller and simpler in structure. © 2016 Pearson Education, Ltd.
27.
4.3 Prokaryotic cells
are structurally simpler than eukaryotic cells • Prokaryotic and eukaryotic cells have • a plasma membrane, • an interior filled with a thick, jellylike fluid called the cytosol, • one or more chromosomes, which carry genes made of DNA, and • ribosomes, tiny structures that make proteins according to instructions from the genes. © 2016 Pearson Education, Ltd.
28.
4.3 Prokaryotic cells
are structurally simpler than eukaryotic cells • The inside of both types of cells is called the cytoplasm. • However, in eukaryotic cells, this term refers only to the region between the nucleus and the plasma membrane. © 2016 Pearson Education, Ltd.
29.
4.3 Prokaryotic cells
are structurally simpler than eukaryotic cells • In a prokaryotic cell, • the DNA is coiled into a region called the nucleoid (nucleus-like) and • no membrane surrounds the DNA. © 2016 Pearson Education, Ltd.
30.
4.3 Prokaryotic cells
are structurally simpler than eukaryotic cells • Outside the plasma membrane of most prokaryotes is a fairly rigid, chemically complex cell wall, which • protects the cell and • helps maintain its shape. • Some prokaryotes have surface projections. • Short projections help attach prokaryotes to each other or their substrate. • Longer projections called flagella (singular, flagellum) propel a prokaryotic cell through its liquid environment. © 2016 Pearson Education, Ltd.
31.
Figure 4.3-0 Fimbriae Ribosomes Nucleoid Plasma membrane Cell wall Capsule Bacterial chromosome A
typical rod-shaped bacterium A colorized TEM of the bacterium Escherichia coli Flagella © 2016 Pearson Education, Ltd.
32.
Figure 4.3-1 Fimbriae Ribosomes Nucleoid Plasma membrane Cell wall Capsule Bacterial chromosome A
typical rod-shaped bacterium Flagella © 2016 Pearson Education, Ltd.
33.
Figure 4.3-2 A colorized
TEM of the bacterium Escherichia coli © 2016 Pearson Education, Ltd.
34.
4.4 Eukaryotic cells
are partitioned into functional compartments • A eukaryotic cell contains • a membrane-enclosed nucleus and • various other organelles (“little organs”), which perform specific functions in the cell. © 2016 Pearson Education, Ltd.
35.
4.4 Eukaryotic cells
are partitioned into functional compartments • The structures and organelles of eukaryotic cells perform four basic functions. 1. The nucleus and ribosomes are involved in the genetic control of the cell. 2. The endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles, and peroxisomes are involved in the manufacture, distribution, and breakdown of molecules. © 2016 Pearson Education, Ltd.
36.
4.4 Eukaryotic cells
are partitioned into functional compartments 3. Mitochondria in all cells and chloroplasts in plant cells are involved in energy processing. 4. Structural support, movement, and communication between cells are functions of the cytoskeleton, plasma membrane, and cell wall. © 2016 Pearson Education, Ltd.
37.
4.4 Eukaryotic cells
are partitioned into functional compartments • The internal membranes of eukaryotic cells partition it into compartments. • Cellular metabolism, the many chemical activities of cells, occurs within organelles. © 2016 Pearson Education, Ltd.
38.
4.4 Eukaryotic cells
are partitioned into functional compartments • Almost all of the organelles and other structures of animals cells are present in plant cells. • A few exceptions exist. • Lysosomes and centrosomes containing centrioles are not found in plant cells. • Only the sperm cells of a few plant species have flagella. © 2016 Pearson Education, Ltd.
39.
4.4 Eukaryotic cells
are partitioned into functional compartments • Plant but not animal cells have • a rigid cell wall that contains cellulose, • plasmodesmata, cytoplasmic channels through cell walls that connect adjacent cells, • chloroplasts, where photosynthesis occurs, and • a central vacuole, a compartment that stores water and a variety of chemicals. © 2016 Pearson Education, Ltd.
40.
Figure 4.4a Rough endoplasmic reticulum Smooth endoplasmic reticulum Golgi apparatus Lysosome Mitochondrion Centrosome with
pair of centrioles Plasma membrane Peroxisome Intermediate filament Microfilament Microtubule CYTOSKELETON NUCLEUS Nuclear envelope Nucleolus Chromatin Ribosomes © 2016 Pearson Education, Ltd.
41.
Figure 4.4b Rough endoplasmic reticulum Smooth endoplasmic reticulum NUCLEUS Nuclear envelope Nucleolus Chromatin Ribosomes Plasma membrane Peroxisome Mitochondrion Microfilament Microtubule CYTOSKELETON Cell
wall of adjacent cell Golgi apparatus Plasmodesma Cell wall Chloroplast Central vacuole © 2016 Pearson Education, Ltd.
42.
THE NUCLEUS AND
RIBOSOMES © 2016 Pearson Education, Ltd.
43.
4.5 The nucleus
contains the cell’s genetic instructions • The nucleus • contains most of the cell’s DNA and • controls the cell’s activities by directing protein synthesis by making messenger RNA (mRNA). • DNA is associated with many proteins and is organized into structures called chromosomes. • When a cell is not dividing, this complex of proteins and DNA, called chromatin, appears as a diffuse mass within the nucleus. © 2016 Pearson Education, Ltd.
44.
4.5 The nucleus
contains the cell’s genetic instructions • The double membrane nuclear envelope has pores that • regulate the entry and exit of large molecules and • connect with the cell’s network of membranes called the endoplasmic reticulum. © 2016 Pearson Education, Ltd.
45.
4.5 The nucleus
contains the cell’s genetic instructions • The nucleolus is • a prominent structure in the nucleus and • the site of ribosomal RNA (rRNA) synthesis. © 2016 Pearson Education, Ltd.
46.
Figure 4.5 Nucleolus Nuclear envelope Endoplasmic reticulum Ribosome Pore Chromatin © 2016
Pearson Education, Ltd.
47.
4.6 Ribosomes make
proteins for use in the cell and export • Ribosomes are involved in the cell’s protein synthesis. • Ribosomes are the cellular components that use instructions from the nucleus, written in mRNA, to build proteins. • Cells that make a lot of proteins have a large number of ribosomes. © 2016 Pearson Education, Ltd.
48.
4.6 Ribosomes make
proteins for use in the cell and export • Some ribosomes are free ribosomes; others are bound. • Free ribosomes are suspended in the cytosol. • Bound ribosomes are attached to the outside of the endoplasmic reticulum or nuclear envelope. © 2016 Pearson Education, Ltd.
49.
Figure 4.6 Rough ER Bound
ribosome Endoplasmic reticulum Protein Ribosome Free ribosome mRNA © 2016 Pearson Education, Ltd.
50.
THE ENDOMEMBRANE SYSTEM ©
2016 Pearson Education, Ltd.
51.
4.7 Many organelles
are connected in the endomembrane system • Many of the membranes within a eukaryotic cell are part of the endomembrane system. • Some of these membranes are physically connected, and others are linked when tiny vesicles (sacs made of membrane) transfer membrane segments between them. © 2016 Pearson Education, Ltd.
52.
4.7 Many organelles
are connected in the endomembrane system • Many of these organelles interact in the • synthesis, • distribution, • storage, and • export of molecules. © 2016 Pearson Education, Ltd.
53.
4.7 Many organelles
are connected in the endomembrane system • The endomembrane system includes the • nuclear envelope, • endoplasmic reticulum (ER), • Golgi apparatus, • lysosomes, • vacuoles, and • plasma membrane. © 2016 Pearson Education, Ltd.
54.
4.7 Many organelles
are connected in the endomembrane system • The largest component of the endomembrane system is the endoplasmic reticulum (ER), an extensive network of flattened sacs and tubules. © 2016 Pearson Education, Ltd.
55.
4.8 The endoplasmic
reticulum is a biosynthetic workshop • There are two kinds of endoplasmic reticulum, which differ in structure and function. 1. Smooth ER lacks attached ribosomes. 2. Rough ER has bound ribosomes that stud the outer surface of the membrane. © 2016 Pearson Education, Ltd.
56.
Figure 4.8a Rough ER Smooth
ER Ribosomes Rough ER Smooth ER © 2016 Pearson Education, Ltd.
57.
Figure 4.8b mRNA 1 2 3 4 Bound ribosome Transport
vesicle buds off Secretory protein inside trans- port vesicle Sugar chain Rough ER Glycoprotein Growing polypeptide © 2016 Pearson Education, Ltd.
58.
4.8 The endoplasmic
reticulum is a biosynthetic workshop • Smooth ER is involved in a variety of metabolic processes, including • the production of enzymes important in the synthesis of lipids, oils, phospholipids, and steroids, • the production of enzymes that help process drugs, alcohol, and other potentially harmful substances, and • the storage of calcium ions. © 2016 Pearson Education, Ltd.
59.
4.8 The endoplasmic
reticulum is a biosynthetic workshop • Rough ER makes • additional membrane for itself and • secretory proteins. © 2016 Pearson Education, Ltd.
60.
4.9 The Golgi
apparatus modifies, sorts, and ships cell products • The Golgi apparatus serves as a molecular warehouse and processing station for products manufactured by the ER. • Products travel in transport vesicles from the ER to the Golgi apparatus. • One side of the Golgi stack serves as a receiving dock for transport vesicles produced by the ER. © 2016 Pearson Education, Ltd.
61.
4.9 The Golgi
apparatus modifies, sorts, and ships cell products • Products of the ER are modified as a Golgi sac progresses through the stack. • The “shipping” side of the Golgi functions as a depot, where products in vesicles bud off and travel to other sites. © 2016 Pearson Education, Ltd.© 2012 Pearson Education, Inc.
62.
Figure 4.9 Golgi apparatus 1 2 3 4 “Receiving”
side of Golgi apparatus Transport vesicle from the ER Transport vesicle from the Golgi “Shipping” side of Golgi apparatus © 2016 Pearson Education, Ltd.
63.
4.10 Lysosomes are
digestive compartments within a cell • A lysosome is a membrane-enclosed sac of digestive enzymes • made by rough ER and • processed in the Golgi apparatus © 2016 Pearson Education, Ltd.
64.
4.10 Lysosomes are
digestive compartments within a cell • Lysosomes • fuse with food vacuoles and digest food, • destroy bacteria engulfed by white blood cells, or • fuse with other vesicles containing damaged organelles or other materials to be recycled within a cell. © 2016 Pearson Education, Ltd.
65.
Animation: Lysosome Formation ©
2016 Pearson Education, Ltd.
66.
Figure 4.10a-1 Digestive enzymes Lysosome Plasma membrane ©
2016 Pearson Education, Ltd.
67.
Figure 4.10a-2 Digestive enzymes Lysosome Food vacuole Plasma
membrane © 2016 Pearson Education, Ltd.
68.
Figure 4.10a-3 Digestive enzymes Lysosome Food vacuole Plasma
membrane © 2016 Pearson Education, Ltd.
69.
Figure 4.10a-4 Digestive enzymes Lysosome Food vacuole Plasma
membrane Digestion © 2016 Pearson Education, Ltd.
70.
Figure 4.10b-1 Lysosome Vesicle containing damaged
mitochondrion © 2016 Pearson Education, Ltd.
71.
Figure 4.10b-2 Lysosome Vesicle containing damaged
mitochondrion © 2016 Pearson Education, Ltd.
72.
Figure 4.10b-3 Lysosome DigestionVesicle containing damaged
mitochondrion © 2016 Pearson Education, Ltd.
73.
4.11 Vacuoles function
in the general maintenance of the cell • Vacuoles are large vesicles that have a variety of functions. • Some protists have contractile vacuoles, which help to eliminate water from the protist. • In plants, vacuoles may • have digestive functions, • contain pigments, or • contain poisons that protect the plant. © 2016 Pearson Education, Ltd.
74.
Video: Paramecium Vacuole ©
2016 Pearson Education, Ltd.
75.
Figure 4.11a Contractile vacuoles Nucleus © 2016
Pearson Education, Ltd.
76.
Figure 4.11b Central vacuole Chloroplast Nucleus ©
2016 Pearson Education, Ltd.
77.
4.12 A review
of the structures involved in manufacturing and breakdown • The following figure summarizes the relationships among the major organelles of the endomembrane system. © 2016 Pearson Education, Ltd.
78.
Figure 4.12 Nucleus Smooth ER Rough
ER Transport vesicle Lysosome Nuclear envelope Golgi apparatus Plasma membrane Transport vesicle © 2016 Pearson Education, Ltd.
79.
4.12 A review
of the structures involved in manufacturing and breakdown • Peroxisomes are metabolic compartments that do not originate from the endomembrane system. • How they are related to other organelles is still unknown. • Some peroxisomes break down fatty acids to be used as cellular fuel. © 2016 Pearson Education, Ltd.
80.
ENERGY-CONVERTING ORGANELLES © 2016 Pearson
Education, Ltd.
81.
4.13 Mitochondria harvest
chemical energy from food • Mitochondria are organelles that carry out cellular respiration in nearly all eukaryotic cells. • Cellular respiration converts the chemical energy in foods to chemical energy in ATP (adenosine triphosphate). © 2016 Pearson Education, Ltd.
82.
4.13 Mitochondria harvest
chemical energy from food • Mitochondria have two internal compartments. 1. The intermembrane space is the narrow region between the inner and outer membranes. 2. The mitochondrial matrix contains • the mitochondrial DNA, • ribosomes, and • many enzymes that catalyze some of the reactions of cellular respiration. © 2016 Pearson Education, Ltd.
83.
4.13 Mitochondria harvest
chemical energy from food • Folds of the inner mitochondrial membrane, called cristae, increase the membrane’s surface area, enhancing the mitochondrion’s ability to produce ATP. © 2016 Pearson Education, Ltd.
84.
Figure 4.13 Mitochondrion Intermembrane space Outer membrane Inner membrane Crista Matrix © 2016
Pearson Education, Ltd.
85.
4.14 Chloroplasts convert
solar energy to chemical energy • Photosynthesis is the conversion of light energy from the sun to the chemical energy of sugar molecules. • Chloroplasts are the photosynthesizing organelles of plants and algae. © 2016 Pearson Education, Ltd.
86.
4.14 Chloroplasts convert
solar energy to chemical energy • Chloroplasts are partitioned into compartments. • Between the outer and inner membrane is a thin intermembrane space. • Inside the inner membrane is a thick fluid called stroma, which contains the chloroplast DNA, ribosomes, many enzymes, and a network of interconnected sacs called thylakoids, where green chlorophyll molecules trap solar energy. • In some regions, thylakoids are stacked like poker chips. Each stack is called a granum. © 2016 Pearson Education, Ltd.
87.
Figure 4.14 Chloroplast Granum Stroma Inner and outer
membranes Thylakoid © 2016 Pearson Education, Ltd.
88.
4.15 EVOLUTION CONNECTION: Mitochondria
and chloroplasts evolved by endosymbiosis • Mitochondria and chloroplasts contain • DNA and • ribosomes. • The structure of this DNA and these ribosomes is very similar to that found in prokaryotic cells. © 2016 Pearson Education, Ltd.
89.
4.15 EVOLUTION CONNECTION: Mitochondria
and chloroplasts evolved by endosymbiosis • The endosymbiont theory states that • mitochondria and chloroplasts were formerly small prokaryotes and • they began living within larger cells. © 2016 Pearson Education, Ltd.
90.
Figure 4.15 Endoplasmic reticulum Nucleus Ancestor of eukaryotic
cells (host cell) Mitochondrion Engulfing of photosynthetic prokaryote Mitochondrion Photosynthetic eukaryote Chloroplast Nonphotosynthetic eukaryote At least one cell Engulfing of oxygen- using prokaryote © 2016 Pearson Education, Ltd.
91.
Figure 4.15-1 Endoplasmic reticulum Nucleus Ancestor of eukaryotic
cells (host cell) © 2016 Pearson Education, Ltd.
92.
Figure 4.15-2 Endoplasmic reticulum Nucleus Ancestor of eukaryotic
cells (host cell) Mitochondrion Nonphotosynthetic eukaryote Engulfing of oxygen- using prokaryote © 2016 Pearson Education, Ltd.
93.
Figure 4.15-3 Endoplasmic reticulum Nucleus Ancestor of eukaryotic
cells (host cell) Mitochondrion Engulfing of photosynthetic prokaryote Mitochondrion Photosynthetic eukaryote Chloroplast Nonphotosynthetic eukaryote At least one cell Engulfing of oxygen- using prokaryote © 2016 Pearson Education, Ltd.
94.
THE CYTOSKELETON AND CELL
SURFACES © 2016 Pearson Education, Ltd.
95.
4.16 The cell’s
internal skeleton helps organize its structure and activities • Cells contain a network of protein fibers, called the cytoskeleton, which organize the structures and activities of the cell. © 2016 Pearson Education, Ltd.
96.
Video: Cytoplasmic Streaming ©
2016 Pearson Education, Ltd.
97.
4.16 The cell’s
internal skeleton helps organize its structure and activities • Microtubules (made of tubulin) • shape and support the cell and • act as tracks along which organelles equipped with motor proteins move. • In animal cells, microtubules grow out from a region near the nucleus called the centrosome, which contains a pair of centrioles, each composed of a ring of microtubules. © 2016 Pearson Education, Ltd.
98.
4.16 The cell’s
internal skeleton helps organize its structure and activities • Intermediate filaments • are found in the cells of most animals, • reinforce cell shape and anchor some organelles, and • are often more permanent fixtures in the cell. © 2016 Pearson Education, Ltd.
99.
4.16 The cell’s
internal skeleton helps organize its structure and activities • Microfilaments (actin filaments) • support the cell’s shape and • are involved in motility. © 2016 Pearson Education, Ltd.
100.
Figure 4.16-0 Nucleus Nucleus Microtubule 25 nm Intermediate
filament 10 nm Microfilament 7 nm © 2016 Pearson Education, Ltd.
101.
Figure 4.16-1 Nucleus Microtubule 25 nm ©
2016 Pearson Education, Ltd.
102.
Figure 4.16-2 Nucleus Intermediate filament 10
nm © 2016 Pearson Education, Ltd.
103.
Figure 4.16-3 Microfilament 7 nm ©
2016 Pearson Education, Ltd.
104.
Figure 4.16-4 Nucleus © 2016
Pearson Education, Ltd.
105.
Figure 4.16-5 Nucleus © 2016
Pearson Education, Ltd.
106.
Figure 4.16-6 © 2016
Pearson Education, Ltd.
107.
4.17 SCIENTIFIC THINKING:
Scientists discovered the cytoskeleton using the tools of biochemistry and microscopy • In the 1940s, biochemists first isolated and identified the proteins actin and myosin from muscle cells. • In 1954, scientists, using newly developed techniques of microscopy, established how filaments of actin and myosin interact in muscle contraction. • In the next decade, researchers identified actin filaments in all types of cells. © 2016 Pearson Education, Ltd.
108.
4.17 SCIENTIFIC THINKING:
Scientists discovered the cytoskeleton using the tools of biochemistry and microscopy • In the 1970s, scientists were able to visualize actin filaments using fluorescent tags and in living cells. • In the 1980s, biologists were able to record the changing architecture of the cytoskeleton. © 2016 Pearson Education, Ltd.
109.
Figure 4.17 © 2016
Pearson Education, Ltd.
110.
4.18 Cilia and
flagella move when microtubules bend • The short, numerous appendages that propel protists such as Paramecium are called cilia (singular, cilium). • Other protists may move using flagella, which are longer than cilia and usually limited to one or a few per cell. • Some cells of multicellular organisms also have cilia or flagella. © 2016 Pearson Education, Ltd.
111.
Video: Paramecium Cilia ©
2016 Pearson Education, Ltd.
112.
Video: Chlamydomonas © 2016
Pearson Education, Ltd.
113.
Figure 4.18a Cilia © 2016
Pearson Education, Ltd.
114.
Figure 4.18b Flagellum © 2016
Pearson Education, Ltd.
115.
4.18 Cilia and
flagella move when microtubules bend • A flagellum, longer than cilia, propels a cell by an undulating, whiplike motion. • Cilia work more like the oars of a boat. • Although differences exist, flagella and cilia have a common structure and mechanism of movement. © 2016 Pearson Education, Ltd.
116.
4.18 Cilia and
flagella move when microtubules bend • Both flagella and cilia are composed of microtubules wrapped in an extension of the plasma membrane. • In nearly all eukaryotic cilia and flagella, a ring of nine microtubule doublets surrounds a central pair of microtubules. • This arrangement is called the 9 2 pattern. • The microtubule assembly is anchored in a basal body with nine microtubule triplets arranged in a ring. © 2016 Pearson Education, Ltd.
117.
Animation: Cilia and
Flagella © 2016 Pearson Education, Ltd.
118.
Figure 4.18c-0 Outer microtubule doublet Central microtubules Cross-linking proteins Motor proteins (dyneins) Plasma
membrane © 2016 Pearson Education, Ltd.
119.
Figure 4.18c-1 Outer microtubule doublet Central microtubules Cross-linking proteins Motor proteins (dyneins) ©
2016 Pearson Education, Ltd.
120.
Figure 4.18c-2 Outer microtubule doublet Central microtubules Cross-linking proteins Motor proteins (dyneins) Plasma membrane ©
2016 Pearson Education, Ltd.
121.
4.18 Cilia and
flagella move when microtubules bend • Cilia and flagella move by bending motor proteins called dynein feet. • These feet attach to and exert a sliding force on an adjacent doublet. • This “walking” causes the microtubules to bend. © 2016 Pearson Education, Ltd.
122.
4.19 The extracellular
matrix of animal cells functions in support and regulation • Animal cells synthesize and secrete an elaborate extracellular matrix (ECM), which • helps hold cells together in tissues and • protects and supports the plasma membrane. © 2016 Pearson Education, Ltd.
123.
4.19 The extracellular
matrix of animal cells functions in support and regulation • The ECM may attach to the cell through other glycoproteins that then bind to membrane proteins called integrins. • Integrins • span the membrane and • attach on the other side to proteins connected to microfilaments of the cytoskeleton. © 2016 Pearson Education, Ltd.
124.
Figure 4.19 Collagen fiber EXTRACELLULAR
FLUID CYTOPLASM Glycoprotein complex with long polysaccharide Connecting glycoprotein Integrin Plasma membrane Microfilaments of cytoskeleton © 2016 Pearson Education, Ltd.
125.
4.20 Three types
of cell junctions are found in animal tissues • Adjacent cells adhere, interact, and communicate through specialized junctions between them. • Tight junctions prevent leakage of fluid across a layer of epithelial cells. • Anchoring junctions fasten cells together into sheets. • Gap junctions are channels that allow small molecules to flow through protein-lined pores between cells. © 2016 Pearson Education, Ltd.
126.
Animation: Desmosomes © 2016
Pearson Education, Ltd.
127.
Animation: Gap Junctions ©
2016 Pearson Education, Ltd.
128.
Animation: Tight Junctions ©
2016 Pearson Education, Ltd.
129.
Figure 4.20 Tight junction Anchoring junction Gap
junction Plasma membranes of adjacent cells Ions or small molecules Extracellular matrix Tight junctions prevent fluid from moving across a layer of cells © 2016 Pearson Education, Ltd.
130.
4.21 Cell walls
enclose and support plant cells • A plant cell, but not an animal cell, has a rigid cell wall that • protects and provides skeletal support that helps keep the plant upright and • is primarily composed of cellulose. • Plant cells have cell junctions called plasmodesmata that allow plants tissues to share • water, • nourishment, and • chemical messages. © 2016 Pearson Education, Ltd.
131.
Figure 4.21 Vacuole Plant cell walls Plasmodesmata Primary
cell wall Secondary cell wall Plasma membrane Cytosol © 2016 Pearson Education, Ltd.
132.
4.22 Review: Eukaryotic
cell structures can be grouped on the basis of four main functions • Eukaryotic cell structures can be grouped on the basis of four functions: 1. genetic control, 2. manufacturing, distribution, and breakdown of materials, 3. energy processing, and 4. structural support, movement, and intercellular communication. © 2016 Pearson Education, Ltd.
133.
Table 4-22-0 © 2016
Pearson Education, Ltd.
134.
Table 4-22-1 © 2016
Pearson Education, Ltd.
135.
Table 4-22-2 © 2016
Pearson Education, Ltd.
136.
You should now
be able to 1. Describe the importance of microscopes in understanding cell structure and function. 2. Describe the two parts of cell theory. 3. Distinguish between the structures of prokaryotic and eukaryotic cells. 4. Explain how cell size is limited. 5. Describe the structure and functions of cell membranes. © 2016 Pearson Education, Ltd.
137.
You should now
be able to 6. Explain why compartmentalization is important in eukaryotic cells. 7. Compare the structures of plant and animal cells. Note the function of each cell part. 8. Compare the structures and functions of chloroplasts and mitochondria. 9. Describe the evidence that suggests that mitochondria and chloroplasts evolved by endosymbiosis. © 2016 Pearson Education, Ltd.
138.
You should now
be able to 10. Compare the structures and functions of microfilaments, intermediate filaments, and microtubules. 11. Relate the structure of cilia and flagella to their functions. 12. Relate the structure of the extracellular matrix to its functions. 13. Compare the structures and functions of tight junctions, anchoring junctions, and gap junctions. © 2016 Pearson Education, Ltd.
139.
You should now
be able to 14. Relate the structures of plant cell walls and plasmodesmata to their functions. 15. Describe the four functional categories of organelles in eukaryotic cells. © 2016 Pearson Education, Ltd.
140.
Table 4-1 © 2016
Pearson Education, Ltd.
141.
Figure 4.UN02 © 2016
Pearson Education, Ltd.
142.
Figure 4.UN03 a. b. c. d. e. f. g. h. i. j. k. l. ©
2016 Pearson Education, Ltd.
143.
Figure 4.UN04-0 Poles of
dividing cell Mark © 2016 Pearson Education, Ltd.
144.
Figure 4.UN04-1 Poles of
dividing cell Mark © 2016 Pearson Education, Ltd.
145.
Figure 4.UN04-2 © 2016
Pearson Education, Ltd.
Baixar agora