2. Cellular Transportation Molecules move

3. Movement of Materials- Passive (requiring no ATP) Diffusion- Movement of materials from areas of higher concentration to areas of lower concentration until dynamic equilibrium is achieved.

4. Diffusion of Gasses

5. Selectively permeable- lets some things through but not others

6. Osmosis- diffusion of water across a membrane Effects turgidity (wilted or not)

7. Have your book on your desk Start reading 8.1 Have your lab out

8. Isotonic- equal solution to cell Water will move equally back and forth from the solution to the cell and vice versa. No net movement of water. Cell remains the same size.

9. Hypertonic- The solution has more solutes than the cell ( less free water) Water will leave the cell and enter the solution. The cell will shrink. Possible crenation.

10. Hypotonic The solution has less solutes than the cell (more free water). Water will leave the solution and enter the cell. The cell will swell. Possible hemolysis.

11. Facilitated diffusion Diffusion with the aid of a protein carrier. Does NOT use ATP Example- glucose into cells

12. Review- osmosis, diffusion, selectively permeable, hypo,iso,hypertonic, turgidity Today – Read 175-180 Work on w.s. 25min Prep for lab Finish w.s.

14. Factors effecting movement through membrane. 1. Size 2. Polarity, Solubility 3. Presence of protein transport 4. Surface area availale

16. Another Passive Movement Filtration-movement by pressure The more pressure the more movement of materials through the membrane

17. Active Transports Require cell energy 2 types 1 Going against diffusion –Sodium potassium pump

18. 2 Pushing large molecules that cannot pass through the membrane –Endocytosis –Exocytosis

19. Plasmolysis Plasmolysis video Loss of water from the cytoplasm causing the cell to shrink

20. Plasma Membrane

21. Parts of Plasma membrane Glylcoprotein/ markers Lipid bilayer Channels/ pores / Transporters Receptors