The Cell: An Overview

1. The Cell: An Overview Chapter 5

2. Cell Theory: Fundamental to Life • All organisms are cellular • Cell: the smallest unit of life • Cells come only from preexisting cells

3. Examples of Cells Fig. 5-2, p. 92

4. Animation: Overview of cells

5. Bright field microscopy Fig. 5-4a, p. 94

6. Dark field microscopy Fig. 5-4b, p. 94

7. Plasma Membrane Fig. 5-6, p. 95

8. Animation: Cell membranes

9. Plasma Membrane • Plasma membrane defines cytoplasm • Lipid bilayer and proteins • Hydrophobic • Selective passage hydrophilic • Internal environment of cell different from external

10. Typical Plant Cell Fig. 5-9a, p. 100

11. Electron Micrograph Plant Cell Fig. 5-9b, p. 100

12. Microbodies Fig. 5-17, p. 107

13. Chloroplast Large central vacuole Cytosol Mitochondrion Microbody Chloroplast Fig. 5-17, p. 107 (removable labels)

14. 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

15. Cytoskeleton Examples Fig. 5-18, p. 107

16. Cell Wall Structure Fig. 5-25, p. 112

17. Extracellular Matrix Fig. 5-27, p. 115

18. Video: Fluid mosaic model