NPB 101- Goldberg SP08 Final

NPB 101- Goldberg SP08 Final - Test Form: A...

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Test Form: A 1 101Sp08GoldbergSectofFinal Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. For a Purkinje fiber action potential, Statement #1: during the upstroke, inward current flow is carried by both Na and some Ca ions. Statement #2: during the plateau phase, inward current is carried by Ca ions and outward current flow is carried by K ions. Statement#3: termination of the plateau phase & initiation of terminal repolarization occurs following inactivation of Ca current channels. a. All three Statements are true. d. Only Statement #1 is true. b. All three Statements are false. e. Only Statements #1 and #3 are true. c. Only Statements #2 and #3 are true. ____ 2. Statement #1. If a tissue segment in the heart is effectively refractory you can conclude that all the cells in the segment are absolute refractory. Statement: #2: If a tissue segment in the heart is relatively refractory, spread of activation through the tissue will occur, but conduction velocity through the tissue will be slowed. a. Both Statements are true. c. Only the first Statement is true. b. Both Statements are false d. Only the second Statement is true. ____ 3. Statement #1: Sympathetic stimulation of SA nodal pacemaker cells increases the slope of the pacemaker potential (diastolic depolarization) but it has no affect on the maximum diastolic potential. . Statement #2: Parasympathetic stimulation to the SA nodal pacemaker cells increases the maximum diastolic potential but has no affect on the slope of the pacemaker potential (diastolic depolarization) a. Both Statements are true. c. Only Statement #1 is true. b. Both Statements are false. d. Only Statement #2 is true.
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Test Form: A 2 ____ 4. The stroke volume ejected by the heart can be increased by only increasing both end diastolic volume (muscle fiber length) and contractility. a. True b. False ____ 5. Compared to the control ecg tracing, which tracing shows the effect of sympathetic stimulation to only the SA node? a. 1 d. 4 b. 2 e. None of the tracings. c. 3
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Test Form: A 3 ____ 6. Use the graph below. Statement #1: Curve A represents an increase in contractility from Control. Statement #2: Point 9 represents an increase in muscle fiber length without a change in contractility from Control. a. Both Statements are true. c. Only the first Statement is true. b. Both Statements are false. d. Only the second Statement is true.
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Test Form: A 4 ____ 7. Filtration across a capillary bed will increase with Statement #1: a decrease in venous pressure. Statement #2: an increase in arteriolar resistance. Statement #3: an increase in capillary blood volume. a. All three Statements are true. d. Only Statements #1 and #2 are true.
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This note was uploaded on 04/05/2012 for the course NPB NPB 101 taught by Professor Weidner/wingfield during the Spring '08 term at UC Davis.

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NPB 101- Goldberg SP08 Final - Test Form: A...

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