exam1-06 - BISC 306, General Physiology Exam 1, October 9,...

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BISC 306, General Physiology Exam 1, October 9, 2006 1. In physiological systems effectors will generate a response that tends to minimize deviations and/or bring altered conditions back to a set point. This kind of corrective response is called: a. allosteric effects b. negative feedback c. autocrine signaling d. fluidity e. positive feedback 2. Which of the following is not true regarding cell membranes? a. carbohydrates attached to lipids or proteins face the outside b. integral membrane proteins are amphipathic c. many integral membrane proteins can move laterally through the bilayer d. phospholipid composition of the inner and outer leaflets is identical e. non-polar core is a barrier to diffusion of hydrophilic molecules 3. Membrane phospholipids: a. may have saturated or unsaturated fatty acids b. have both hydrophilic and hydrophobic portions c. arrange themselves into a bilayer with fatty acid tails facing each other d. may serve as substrates in cell signaling mechanisms e. all of the above 4. Fick's equation for simple diffusion [F = KpA (Co-Ci)]. .. a. can describe the movement of glucose across cell membranes b. describes a linear, non-saturable process c. may include, in the permeability constant, a measure of the partition coefficient d. a and b e. b and c 5. Movement of small molecules directly between the cytoplasm of adjacent cells would be mediated by: a. primary active transporters b. capillaries c. gap junctions d. GLUTs e. tight junctions
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6. The Na + /H + exchanger is an example of: ions down their concentration gradient a. secondary active transport b. ligand gated ion channel c. facilitated diffusion carrier d. primary active transport e. voltage-gated ion channel 7. The combined driving force (voltage plus concentration gradient) for outward K + movement is greater than that for inward Na + movement. a. True b. False 8. Which of the following is not true regarding the Na + /K + -ATPase? a. transports both Na + and K + ions against their concentration gradients b. binds and hydrolyzes ATP c. is localized to the basolateral membrane of transporting epithelial cells d. has a high affinity for K + when open to the cytoplasm e. keeps intracellular Na + concentration low, thus allowing for secondary active transport of other substrates 9. The sodium-glucose luminal cotransporter (SGLT). ..
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This note was uploaded on 10/28/2009 for the course PHYS 306 taught by Professor Laverty during the Fall '09 term at University of Delaware.

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exam1-06 - BISC 306, General Physiology Exam 1, October 9,...

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