Acr7D7C.tmp

Acr7D7C.tmp - 1. Consider a sample of normal human blood...

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Sheet1 Page 1 1. Consider a sample of normal human blood that contains approximately 60% a. have a hematocrit of about 40. b. would contain about 40% erythrocytes by volume c. would contain about 40% platelets by volume. d. Would contain about 40% leukocytes by volume e. a and b $ 2 a. The Capillaries have the highest blood volume because, even though they are very small in diameter and relatively short in length, they are very numerous. b. The Arteries have the highest blood volume because they are very elastic. c. The Veins have the highest blood volume because they are very compliant over a normal range of transmural pressures. $ d. All of the above e. None of the above 3 Application of a drug which increased K+ (potassium) permeability during a. increase the slope of the pacemaker potential. b. cause an increase in heart rate. c. cause a positive inotropic response in SA nodal cells. d. a and b e. none of the above $ 4 Considering all the potentially self-excitatory tissue in the heart, the Sino-Atrial a. phase zero of the SA nodal action potential is caused by rapid Na+ (sodium) influx. b. increased Ca++ (calcium) permeability causes repolarization of SA nodal cells. c. the SA node has the highest natural rate of spontaneous action potential generation of all potentially self-excitatory cardiac tissues. $ d. the SA node is the only potential cardiac pacemaker innervated by motor nerves. e. none of the above plasma. This blood wouldh In the systemic circulation the distribution of total blood volume is such thath phase 4 of the Sino-Atrial nodal action potential would be expected toh node is the normal cardiac pacemaker becauseh
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Sheet1 Page 2 5 a. there is no release of Ca++ (calcium) from the SR (Sarcoplasmic Reticulum) during excitation-contraction coupling in cardiac myofibers. b. cardiac myofibers are innervated by autonomic nerve fibers. c. the force of cardiac muscle contraction can not be summated as a result of an increase of frequency of stimulation. d. all of the above e. b and c $ 6 Consider the following values for a systemic capillary: Pcap = 30 mmHg Pint Err:509 COPcap = 20 mmHg a. net capillary filtration $
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This note was uploaded on 12/23/2008 for the course NPB 101 taught by Professor Fuller,charles/goldberg,jack during the Fall '08 term at UC Davis.

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Acr7D7C.tmp - 1. Consider a sample of normal human blood...

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