1. Objective: You will be able to describe the structure and function of the components of the plasma membrane.
Do Now:
Read, “The cell membrane” on p. 182
List all of the molecules that make up a cell membrane

2. Figure 5.12 The structure of a phospholipid

3. Figure 8.1 Artificial membranes (cross sections)

4. Figure 8.2 Two generations of membrane models

5. Figure 8.9 Some functions of membrane proteins

6. Figure 8.6 The detailed structure of an animal cell’s plasma membrane, in cross section

7. Objective: You will be able to discuss how diffusion and osmosis work.
Do Now:
Read, “Diffusion” on p. 184
Explain how molecules move from area of high concentration to areas of low concentration

8. Figure 8.10 The diffusion of solutes across membranes

9. Review
Passive transport is the movement of substances down their concentration gradients
Does not require energy
Diffusion is a type of passive transport
It is the movement of molecules down the gradient
Osmosis is a type of diffusion
It is the diffusion of water molecules

10. Objective: You will be able to compare and contrast passive and active transport.
Do Now:
Read all of p. 185
Differentiate between hypertonic, hypotonic and isotonic solutions.

11. Figure Osmosis

12. Another type of passive transport is facilitated diffusion
Moves molecules down its concentration gradient faster than normal diffusion

13. Active transport Moves molecules against its concentration gradient
Requires energy to move molecules
The energy used is called ATP

14. Figure 8.17 An electrogenic pump

15. Figure Cotransport

16. Figure 8.16 Review: passive and active transport compared

17. Figure 8.15 The sodium-potassium pump: a specific case of active transport

18. Figure 8.19 The three types of endocytosis in animal cells