1. Cell Structure and Function Ch. 4&5
Cell Theory
All living things are composed of one or more cells.
All cells come from preexisting cells
Cell: smallest functional unit of life & exhibits all characteristics of life

2. Classification of Cells
Prokaryotic Cells
No true nucleus
Small
Simple structure
1st to inhabit earth
i.e. Bacteria

3. Classification of Cells
Eukaryotic Cells
True nucleus
Larger
Complex structure w/organelles
i.e. Animal or Plant cells

4. Why Must Cells Be Small?

5. Cell Membrane Function
Boundary between internal and external environments
Selectively permeable - controls what goes in and out of cell
Participates in cell to cell communication
Used for cellular identification

6. Cell Membrane Structure
Fluid Mosaic Model

7. Cell Membrane Structure
Phospholipids

8. Cell Membrane Structure
Proteins

9. Cell Membrane Structures: Glycolipids, Glycoproteins, Cholesterol

10. Movement of Molecules Across Membranes
Passive Transport
Diffusion

11. Passive Transport

12. Movement of Molecules Across Membranes
Passive Transport
Osmosis

13. Osmosis and Water Balance

14. Osmosis and Water Balance

15. Osmosis and Water Balance

16. Movement of Molecules Across Membranes
Passive Transport
Facilitated Diffusion

17. Movement of Molecules Across Membranes
Active Transport

18. Movement of Molecules Across Membranes
Endocytosis
Exocytosis