2. 1 The Cell Membrane A Simulation

3. 2 Cell membrane simulation This power point will help explain some of the features of a semi-permeable membrane. We will make a model of the cell membrane in class.

4. 3

5. 4 Baby Food Jar

6. 5 1. Add water This is the cytosol (solvent inside the cell)

7. 6 The solvent inside the cell. Everything is dissolved here.

8. 7 11. Add water 22. Add salt This represents a salty solution (your cells are hypertonic)

9. 8 The Same Saltiness As the Ocean!!

10. 9 You are ISOTONIC with the sea! isotonicHey Mrs. W, we are ISOTONIC!

11. 10 11. Add water 22. Add salt 33 Add a bead This represents a gated channel

12. 11 What’s the function of a gate?

13. 12 11. Add water 22. Add salt 33 Add a bead 44 Add oil Oil is the main organic molecule in a semi-permeable membrane.

14. 13 They have a fancy name: PHOSPHOLIPIDS! And a fancy shape called bipolar

15. 14 Protein The oil represents the cell membrane, made out of phospholipids and a second molecule: (We will find out more about this later.)

16. 15 11. Add water 22. Add salt 33 Add a bead 44 Add oil 55 Add 2 drops FC Observe what happens to the food coloring

17. 16 11. Add water 22. Add salt 33 Add a bead 44 Add oil 55 Add 2 drops FC 66 Add some pepper Will diffusion occur?

18. 17 11. Add water 22. Add salt 33 Add a bead 44 Add oil 55 Add 2 drops FC 66 Add some pepper 77. Add several drops of soap to the pepper

19. 18 What’s a carrier do? A BIG carrier! A LITTLE carrier !

20. 19 RIGHT! It carries stuff!

21. 20 The Ultimate Carrier!