Houston Community College Campbell in Focus General Biology I Name:________________________ Chapter 5: Membranes and Cell Signaling 1. List the components of plasma membrane: a. _______________________ b. _______________________ c. _______________________ 2. What is the function of the plasma membrane in a cell? 3. What does the “fluid-mosaic model” say about the plasma membrane? 4. List the function of membrane proteins a.______________________________________________ b.______________________________________________ c.______________________________________________ d. _____________________________________________ e. _____________________________________________ f. ______________________________________________ 5. What are the two ways in which substances are transported across the cell membrane? a. _______________________ b. _______________________ 6. What is passive transport? Give examples of passive transport. 7. What is diffusion? 8. List the types of passive transport and give examples of substances transported. a. _______________________ e.g. __________________________________ b. _______________________ e.g. __________________________________ c. _______________________ 9. e.g. __________________________________ What is osmosis? 10. Define: A. Hypertonic Solution: B. Isotonic Solution: C. Hypotonic Solution: 11. What happens to a plant cell placed in an isotonic solution? _______________________________________________________________________________ 12. What happens to a plant cell placed in a hypertonic solution? ________________________________________________________________________________ 13. What happens to a plant cell placed in a hypotonic solution? __________________________________________________________________________________ 14. What happens to an animal cell placed in an isotonic solution? 15. What happens to an animal cell placed in a hypertonic solution? 16. What happens to an animal cell placed in a hypotonic solution? ____________________________________________________________________________________ 17. What is active transport? 18. What is endocytosis? 19. List the three types of endocytosis in an animal cell: a. _______________________ b. _______________________ c. _______________________ 20. Give one example of a substance that can be taken inside the cell by the process of receptor mediated endocytosis. 21. What is exocytosis? Give examples of substances that can be transported across the membrane by exocytosis. Cell Communication 1. Define: Signal Transduction 2. List and define the 3 types of cell communication processes between cells. a. b. c. 3. What is the difference between synaptic signaling and hormonal signaling? 4. What are the 3 stages of cell signaling? Give a short description for each stage. a. b. c. 5. List the types of receptors you have studied. Give examples of molecules that act through these receptors a. b. 6. Give the steps involved in the signal transduction pathway for the action of Epinephrine on liver cells. 8. What mechanism is involved in the signal transduction pathway?