NPB101_SillmanWeidner_MT2

NPB101_SillmanWeidner_MT2 - NPB 101 Fall 2001 Midterm II 1...

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NPB 101 - Fall 2001 Midterm II 1 November 19, 2001 1. During the normal cardiac cycle the period of time that elapses between the closure of the aortic and pulmonic semilunar valves and the opening of the atrio-ventricular valves is… a. part of ventricular systole. b. The period of isovolumetric ventricular relaxation. c. The period of rapid ventricular filling. d. a and c e. None of the above 2. Cardiac muscle differs from skeletal in that… a. Ca++ is not involved in excitation-contraction coupling in cardiac muscle. b. Cardiac muscle is capable of positive inotropism, while skeletal muscle is not. c. Cardiac muscle cannot be tetanized. d. All of the above e. b and c 3. Suppose you are taking part in an experiment and are lying flat on your back on a tilt-table. After a short “control” period, the physiologist conducting the experiment “tilts” you to a head-up position to simulate standing. As a result of this maneuver, one would expect… a. reflex tachycardia. b. Decreased blood volume in the upper extremities. c. Increased venous transmural pressure in the lower extremities. d. All of the above e. a and c 4. Consider a situation, such as hemorrhage, when blood is lost from the body and blood pressure falls. In compensation, one would expect… a. an increase in the gK+ (conductance of K+) during Phase 4 of the SA nodal action potential. b. an increase in the gNa+ during Phase 0 (zero) of the SA nodal action potential causing an increase in heart rate. c. A decrease in the slope of the Pacemaker Potential during Phase 4 of the SA nodal action potential. d. All of the above e. None of the above
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NPB 101 - Fall 2001 Midterm II 2 5. The largest percentage of total vascular resistance in a resting mammal would be found in the … a. large systemic arteries. b. Pulmonary arteries. c. Capillaries. d. Large systemic veins. e. None of the above 6. Consider a situation during which the body pH has fallen from 7.4 to 7.2 as a result of the administration of a dilute solution of HCl. In compensation, one would expect… a. the kidney to produce urine high in HCO3- content. b. Decreased plasma [HCO3-]. c. Increased filtration of NaHCO3 into the proximal tubule. d. All of the above e. None of the above 7. Which of the following is actively reabsorbed in the nephron?
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This note was uploaded on 04/05/2012 for the course NPB 101 taught by Professor Fuller,charles/goldberg,jack during the Spring '08 term at UC Davis.

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NPB101_SillmanWeidner_MT2 - NPB 101 Fall 2001 Midterm II 1...

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