BIO 4B Investigate and identify cellular processes including homeostasis, permeability, energy production, transportation of molecules, disposal of wastes, function of cellular parts, and synthesis of new molecules.

1. Describe the function of the plasma membrane.
2. Describe the Davson-Danielli membrane model and explain how it contributed to our current understanding of membrane structure.
3. Describe the contribution J.D. Robertson, S.J. Singer, and G.L. Nicolson made to clarify membrane structure.
4. Describe the fluid properties of the cell membrane and explain how membrane fluidity is influenced by membrane composition.
5. Explain how hydrophobic interactions determine membrane structure and function.
6. Describe how proteins are spatialy arranged in the cell membrane and how they contribute to membrane function.
7. Describe factors that affect selective permeability of membranes.
8. Define diffusion; explain what causes it and why it is a spontaneous process.
9. Explain what regulates the rate of passive transport.
10. Explain why a concentration gradient across a membrane represents potential energy.
11. Define osmosis and predict the direction of water movement based upon differences in solute concentration.
12. Explain how bound water affects the osmotic behavior of dilute biological functions.
13. Describe how living cells with and without walls regulate water balance.
14. Explain how transport proteins are similar to enzymes.
15. Describe one model for facilitated diffusion.
16. Explain how active transport differs from diffusion.
17. Explain what mechanisms can generate a membrane potential or electrochemical gradient.
18.Explain how large molecules are transported across the membrane.
19. Give an example of receptor mediated endocytosis

Outline of the Unit
Vocabulary of the Unit
Membrane model evolution
Mosaic of Lipids, Proteins, and Carbohydrates
Passive Transport is Diffusion
Active Transport
Exocytosis and Endocytosis
Other resources you may try
Components and function of the Cellular Membrane
Types of transport within a cell and across a membrane

1. Read prelab information and double check the procedures that you did today. Make connections as to what you are supposed to be looking for tomorrow and why we are placing our egg in each type of solution. Pull the egg video off of the server and watch to see what to expect.
2. Read Pg.80 - 89.
3. Answer any questions that you still need to finish on the egg lab as well as the Fluid Mosaic Membrane Model Activity. Read pg. 90 - end of chapter.
4.Pull Transport Across Cell Membrane video from server. Make sure you have also viewed "The Plasma Membrane" and "Tonicity and Osmosis" videos.
5. Study for Test!!!

The Plasma Membrane

The Gate Keepers Lab