test 1 -- 2007

test 1 -- 2007 - VPHY 3100 Elements of Physiology EXAM I...

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VPHY 3100 Elements of Physiology EXAM I February 2, 2007 Multiple Choice (2.5 points each) CHOOSE THE SINGLE BEST ANSWER 1. Homeostasis is best thought of as being a state of A. constant fluctuation B. stasis C. dynamic constancy D. inconsistency E. death 2. Protein carrier mediated transport of molecules display A. specificity. B. competition. C. saturation. D. All of the choices are correct . 3. Cells placed in hypotonic solutions will A. decrease in volume. B. increase intracellular solute concentration. C. increase in volume. D. loose water to the solution. 4. The Na+/K+ pump A. is an example of primary active transport. B. generates a positive membrane potential. C. actively transports 2 potassium ions out of the cell. D. actively transports 3 sodium ions into the cell. E. none of the above are correct 5. All cells A. have a resting membrane potential. B. actively extrude calcium. C. use simple diffusion. D. All of the choices are correct. 1
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6. The resting membrane potential is closest to the equilibrium potential for A. sodium ions. B. magnesium ions. C. calcium ions. D. potassium ions. 7. The majority of water within the body is found in the A. intracellular compartment. B. extracellular compartment. C. blood plasma. D. interstitial fluid. 8. This is able to passively penetrate the plasma membrane. A. O2 B. small charged particles C. large polar molecules D. All of the choices are correct. 9. Ion channels that can be opened by physiological stimuli are said to be A. polar. B. aquaporins. C. hypertonic. D. gated. 10. Which of the following statements is true concerning the plasma membrane? A. The membrane structure is a phospholipid monolayer. B. The membrane structure has the hydrophilic phosphate heads facing the extracellular compartment and the hydrophobic lipid tails on the intracellular side in contact with the cytoplasm. C.
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test 1 -- 2007 - VPHY 3100 Elements of Physiology EXAM I...

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