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Dive into Chapter 5: Cell Theory, where we explore the foundational concept that all organisms are made up of cells. Each cell represents the smallest unit of life, with the critical understanding that cells arise only from preexisting cells. This chapter covers vital elements such as the plasma membrane's structure, function, and how it maintains the internal environment. Gain insights into plant cells, microbodies, and the cytoskeleton's role in cellular organization. Enhanced by animations and microscopy images, this overview illustrates the fluid mosaic model in detail.
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The Cell: An Overview Chapter 5
Cell Theory: Fundamental to Life • All organisms are cellular • Cell: the smallest unit of life • Cells come only from preexisting cells
Examples of Cells Fig. 5-2, p. 92
Bright field microscopy Fig. 5-4a, p. 94
Dark field microscopy Fig. 5-4b, p. 94
Plasma Membrane Fig. 5-6, p. 95
Plasma Membrane • Plasma membrane defines cytoplasm • Lipid bilayer and proteins • Hydrophobic • Selective passage hydrophilic • Internal environment of cell different from external
Typical Plant Cell Fig. 5-9a, p. 100
Electron Micrograph Plant Cell Fig. 5-9b, p. 100
Microbodies Fig. 5-17, p. 107
Chloroplast Large central vacuole Cytosol Mitochondrion Microbody Chloroplast Fig. 5-17, p. 107 (removable labels)
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
Cytoskeleton Examples Fig. 5-18, p. 107
Cell Wall Structure Fig. 5-25, p. 112
Extracellular Matrix Fig. 5-27, p. 115
