This document provides a summary of key concepts from Chapter 6 of Campbell Biology related to cell structure and function. It begins with an overview of microscopy techniques used to study cells, including light microscopy and electron microscopy. It then discusses the distinguishing features of prokaryotic and eukaryotic cells. The majority of the document focuses on organelles found in eukaryotic cells and their functions, including the nucleus, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles, mitochondria, and chloroplasts. Each organelle is described and its role in cellular processes is explained. Diagrams and electron microscope images are included to illustrate cellular structures.
5. Figure 6.2 10 m
1 m
0.1 m
1 cm
1 mm
100 µm
10 µm
1 µm
100 nm
10 nm
1 nm
0.1 nm Atoms
Small molecules
Lipids
Proteins
Ribosomes
Viruses
Smallest bacteria
Mitochondrion
Most bacteria
Nucleus
Most plant and
animal cells
Human egg
Frog egg
Chicken egg
Length of some
nerve and
muscle cells
Human height
Unaidedeye
Lightmicroscopy
Electronmicroscopy
Super-
resolution
microscopy
18. Figure 6.6
Outside of cell
Inside of cell
0.1 µm
(a) TEM of a plasma
membrane
Hydrophilic
region
Hydrophobic
region
Hydrophilic
region
Carbohydrate side chains
ProteinsPhospholipid
(b) Structure of the plasma membrane
33. Figure 6.10
0.25 µm
Free ribosomes in cytosol
Endoplasmic reticulum (ER)
Ribosomes bound to ER
Large
subunit
Small
subunit
Diagram of a ribosome
TEM showing ER and
ribosomes
60. Figure 6.18
Ribosomes
Stroma
Inner and outer
membranes
Granum
1 µmIntermembrane spaceThylakoid
(a) Diagram and TEM of chloroplast (b) Chloroplasts in an algal cell
Chloroplasts
(red)
50 µm
DNA
74. Direction of swimming
(b) Motion of cilia
Direction of organism’s movement
Power stroke Recovery stroke
(a) Motion of flagella
5 µm
15 µm
Figure 6.23
82. Figure 6.25 Microtubule
doublets
Dynein protein
ATP
(a) Effect of unrestrained dynein movement
Cross-linking proteins
between outer doublets
ATP
Anchorage
in cell
(b) Effect of cross-linking proteins
(c) Wavelike motion
1
2
3
90. Figure 6.27b
100 µm
Cortex (outer cytoplasm):
gel with actin network
Inner cytoplasm: sol
with actin subunits
(b) Amoeboid movement
Extending
pseudopodium
103. Figure 6.32
Tight junctions prevent
fluid from moving
across a layer of cells
Tight junction
Tight junction
TEM
0.5 µm
TEM
1 µm
TEM
0.1 µm
Extracellular
matrixPlasma membranes
of adjacent cells
Space
between cells
Ions or small
molecules
Desmosome
Intermediate
filaments
Gap
junction
104. Tight junctions prevent
fluid from moving
across a layer of cells
Extracellular
matrix
Plasma membranes
of adjacent cells
Space
between cells
Ions or small
molecules
Desmosome
Intermediate
filaments
Tight junction
Gap
junction
Figure 6.32a
Editor's Notes
For the Discovery Video Cells, go to Animation and Video Files.
Figure 6.2 The size range of cells.
Figure 6.3 Exploring: Microscopy
Figure 6.5 A prokaryotic cell.
Figure 6.5 A prokaryotic cell.
Figure 6.6 The plasma membrane.
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Figure 6.8 Exploring: Eukaryotic Cells
Figure 6.8 Exploring: Eukaryotic Cells
Figure 6.9 The nucleus and its envelope.
Figure 6.9 The nucleus and its envelope.
Figure 6.9 The nucleus and its envelope.
Figure 6.9 The nucleus and its envelope.
Figure 6.9 The nucleus and its envelope.
For the Cell Biology Video Staining of Endoplasmic Reticulum, go to Animation and Video Files.
Figure 6.10 Ribosomes.
For the Cell Biology Video ER and Mitochondria in Leaf Cells, go to Animation and Video Files.
Figure 6.11 Endoplasmic reticulum (ER).
Figure 6.11 Endoplasmic reticulum (ER).
For the Cell Biology Video ER to Golgi Traffic, go to Animation and Video Files.
For the Cell Biology Video Golgi Complex in 3D, go to Animation and Video Files.
For the Cell Biology Video Secretion From the Golgi, go to Animation and Video Files.
Figure 6.12 The Golgi apparatus.
Figure 6.12 The Golgi apparatus.
For the Cell Biology Video Phagocytosis in Action, go to Animation and Video Files.
Figure 6.13 Lysosomes.
Figure 6.13 Lysosomes.
Figure 6.13 Lysosomes.
Figure 6.14 The plant cell vacuole.
Figure 6.15 Review: relationships among organelles of the endomembrane system.
Figure 6.15 Review: relationships among organelles of the endomembrane system.
Figure 6.15 Review: relationships among organelles of the endomembrane system.
For the Cell Biology Video ER and Mitochondria in Leaf Cells, go to Animation and Video Files.
For the Cell Biology Video Mitochondria in 3D, go to Animation and Video Files.
For the Cell Biology Video Chloroplast Movement, go to Animation and Video Files.
Figure 6.17 The mitochondrion, site of cellular respiration.
Figure 6.17 The mitochondrion, site of cellular respiration.
Figure 6.18 The chloroplast, site of photosynthesis.
For the Cell Biology Video The Cytoskeleton in a Neuron Growth Cone, go to Animation and Video Files
For the Cell Biology Video Cytoskeletal Protein Dynamics, go to Animation and Video Files.
Figure 6.20 The cytoskeleton.
Figure 6.21 Motor proteins and the cytoskeleton.
For the Cell Biology Video Actin Network in Crawling Cells, go to Animation and Video Files.
For the Cell Biology Video Actin Visualization in Dendrites, go to Animation and Video Files.
Table 6.1 The Structure and Function of the Cytoskeleton
Table 6.1 The Structure and Function of the Cytoskeleton
Table 6.1 The Structure and Function of the Cytoskeleton
For the Cell Biology Video Transport Along Microtubules, go to Animation and Video Files.
For the Cell Biology Video Movement of Organelles in Vivo, go to Animation and Video Files.
For the Cell Biology Video Movement of Organelles in Vitro, go to Animation and Video Files.
Figure 6.22 Centrosome containing a pair of centrioles.
Figure 6.23 A comparison of the beating of flagella and motile cilia.
Figure 6.24 Structure of a flagellum or motile cilium.
Figure 6.24 Structure of a flagellum or motile cilium.
Figure 6.24 Structure of a flagellum or motile cilium.
Figure 6.24 Structure of a flagellum or motile cilium.
Figure 6.24 Structure of a flagellum or motile cilium.
For the Cell Biology Video Motion of Isolated Flagellum, go to Animation and Video Files.
For the Cell Biology Video Flagellum Movement in Swimming Sperm, go to Animation and Video Files.
Figure 6.25 How dynein “walking” moves flagella and cilia.
Figure 6.25 How dynein “walking” moves flagella and cilia.
Figure 6.25 How dynein “walking” moves flagella and cilia.
Figure 6.26 A structural role of microfilaments.
Figure 6.27 Microfilaments and motility.
Figure 6.27 Microfilaments and motility.
Figure 6.27 Microfilaments and motility.
Figure 6.27 Microfilaments and motility.
For the Cell Biology Video Interphase Microtubule Dynamics, go to Animation and Video Files.
For the Cell Biology Video Microtubule Sliding in Flagellum Movement, go to Animation and Video Files.
For the Cell Biology Video Microtubule Dynamics, go to Animation and Video Files.
For the Cell Biology Video Ciliary Motion, go to Animation and Video Files.
For the Cell Biology Video Cartoon Model of a Collagen Triple Helix, go to Animation and Video Files.
For the Cell Biology Video Staining of the Extracellular Matrix, go to Animation and Video Files.
For the Cell Biology Video Fibronectin Fibrils, go to Animation and Video Files.
Figure 6.30 Extracellular matrix (ECM) of an animal cell.
Figure 6.30 Extracellular matrix (ECM) of an animal cell.
Figure 6.30 Extracellular matrix (ECM) of an animal cell.
Figure 6.31 Plasmodesmata between plant cells.
Figure 6.32 Exploring: Cell Junctions in Animal Tissues
Figure 6.32 Exploring: Cell Junctions in Animal Tissues