Chapter 7 HW Membrane Transport PDF

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My homework about cell membranes....

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AP Bio Homework Campbell & Reece textbook, Chapter 7: Membrane Structure & Function. Number and answer the following on a separate sheet of paper. 1. Make a simple drawing of the fluid mosaic model of the cell membrane. Label both ends of the phospholipids, and the surface and transmembrane proteins. 2. What is the significance of the phospholipid arrangement? 3. List four functions of the plasma membrane. 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. What factors affect the permeability of membranes? 7. Define diffusion; explain what causes it. 8. Explain what regulates the rate of passive transport. 9. Explain why a concentration gradient across a membrane represents potential energy. 10. Define “osmosis” and predict the direction of water movement based upon differences in solute concentrations, osmotic pressure and osmotic potential. 11. Define water potential. Does water osmose from low to high, or high to low water potential? 12. How do living cells (1) with and (2) without walls regulate water balance? 13. Describe facilitated diffusion. 14. What is the Sodium-Potassium Pump? What is it used for? Do you consider this a form of active or passive transport? Why? 15. Explain what mechanisms can generate a membrane potential or electrochemical gradient. 16. Explain how large molecules may be transported across cell membranes. 17. Compare and contrast (a) endocytosis/exocytosis; and (b) pinocytosis/phagocytosis. 18. what is the primary difference between carrier proteins (in the cell membrane) that participate in facilitated diffusion, and those that participate in active transport? 19. Describe what would happen to the molecules in a drop of ink dropped into a beaker of water. What is this process called? 20. Name three types of passive transport and three types of active transport....