the cell: an overview chapter 5. cell theory: fundamental to life all organisms are cellular cell:...
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The Cell: An Overview
Chapter 5
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Cell Theory: Fundamental to Life
All organisms are cellular
Cell: the smallest unit of life
Cells come only from preexisting cells
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Examples of Cells
Fig. 5-2, p. 92
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Animation: Overview of cells
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Fig. 5-4a, p. 94
Bright field microscopy
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Fig. 5-4b, p. 94
Dark field microscopy
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Plasma Membrane
Fig. 5-6, p. 95
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Animation: Cell membranes
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Plasma Membrane
Plasma membrane defines cytoplasm
Lipid bilayer and proteins
Hydrophobic• Selective passage hydrophilic
Internal environment of cell different from external
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Typical Plant Cell
Fig. 5-9a, p. 100
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Electron Micrograph Plant Cell
Fig. 5-9b, p. 100
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Microbodies
Fig. 5-17, p. 107
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Fig. 5-17, p. 107 (removable labels)
CytosolLargecentralvacuole
Chloroplast
Chloroplast
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Cytoskeleton
Cytoskeleton • Maintains shape and organization
• Interconnected protein fibers and tubes
Most prominent in animal cells• Plants and fungi also use cell walls and central
vacuole
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Cytoskeleton Examples
Fig. 5-18, p. 107
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Cell Wall Structure
Fig. 5-25, p. 112
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Extracellular Matrix
Fig. 5-27, p. 115
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Video: Fluid mosaic model