1. Aim: How does the structure of the cell membrane contribute to its function?

2. What is the function of the structure below?

3. Functions of the cell Membrane  Protection  Controls what enters and exits  Has Receptors: Allows for cell communication

4. Receptors RECEPTORS Receptors (proteins in the membrane) allow for cell to cell communication. How? By receiving hormones and neurotransmitters

5. Cell membrane Structure  lipids  Proteins

6. Proteins and Lipids PROTEIN Lipid

7. Why is this model called the fluid mosaic model? http://home.earthlink.net/~shalpine/anim/Life/memb.htm Fluid: because the membrane moves Mosaic : because it is made of many pieces +=

8. How is the cell membrane different from an umbrella? An umbrella is impermeable It does not allow materials through

9. How is an umbrella different from a window screen? The window screen is permeable

10. How is a window screen similar to the cell membrane? The cell membrane is SEMI- PERMEABLE-it allows materials through

11. What will get through the cell membrane? Things that are small enough to pass across!

12. What is the difference between these molecules? They are too big!

13. Can the elephant get into the house?

14. Do all things get through the cell membrane? SELECTIVELY PERMEABLE

15. Why do some things get through the cell membrane? Small molecules are more likely to get through the cell membrane compared to big molecules