1. Exercise 5A The Cell: Transport and Membrane Permeability

2. There are two general categories of cellular transport mechanisms:

3. Passive Simple diffusion Facilitated or protein mediated Filtration Osmosis Active ATP driven solute pumps Vesicular Endocytosis Phagocytosis Bulk-phase endocytocysis (pinocytosis) Phagocytosis Types of transport

4. Rate of diffusion is influenced by: concentration temperature molecular or atomic weight of solute density of solvent gases allow for the quickest liquids are intermediate solids allow for the slowest

5. Diffusion

6. Diffusion of dye in agar KMnO 2 Methylene blue

7. Facilitated diffusion

8. Osmosis a.

9. Osmosis b.

10. What’s an “Osmometer”?

11. Normal erythrocytes in an isotonic solution

12. RBCs in hypertonic saline solution: crenation

13. Isotonic vs hypotonic Normal RBCs: 0.9% NaCl Hemolysis: Distilled water

14. Active transport requires cellular energy

15. Exocytosis

16. Endocytosis (a.k.a. pinocytosis)

17. Phagocytosis: cellular eating

18. Active transport: Antiport The sodium/potassium pump

19. Active transport: Symport The sodium/glucose symporter

20. Transport Animations http://personal.tmlp.com/Jimr57/textbook/chapter3/cmf1a.htm