Exam 1 51-79

78
Which population of blood vessels serves as the primary determinant of total peripheral resistance (TPR) and therefore blood pressure?

63
Which statement characterizes a portal system of blood vessels?

75
Which change would increase blood flow resistance the most?

64
Blood flows faster in a venule than in a capillary because venules?

52
The normal site of initiation of the cardiac cycle is the?

59
An increase in ventricular contractile force due to sympathetic nervous system sympathetic nervous system stimulation would be termed an increase in?

67
Which factor DOES NOT contribute to intrinsic (local) control of blood flow?

66
During exercise, skeletal muscle total blood flow increases 12 fold or more. What is the basis for this dramatic increase in blood flow?

Free question

60
Carotid sinus baroreceptor and carotid body chemoreceptor sensation is principally mediated by which pathway?

74
Even though vessel radius decreases the cross sectional area of a capillary bed increases, causing blood flow velocity to:

62
A person with a systolic blood pressure of 130 and a diastolic pressure of 85mmHg would have a mean arterial pressure about?

69
A blood vessel made up of only endothelial cells and their basal lamina would be classified as?

57
The QRS complex of a normal electrocardiogram indicates?

79
MAP = CO x TPR and CO = SV x HR. Reflex increases in which two factors above their pre-hemorrhage values mediate MAP recovery following acute hemorrhage?

55
The vagus nerves mediate parasympathetic regulation of the heart by the cardiac control centers. If the vagus nerves were stimulated with an electrode, the heart rate would:

71
Aortic arch stretch receptors that are sensitive to changes in vascular pressure are termed?

53
During the ventricular systole isovolemic contraction phase:

73
Which approach is an effective means of increasing blood pressure?

77
Exercise is accompanied by marked increases in skeletal muscle blood flow. Which factors primarily account for increased muscle blood flow during exercise?

72
While capillary hydrostatic pressure is important for fluid filtration out of the capillaries, which effect is most important for fluid reabsorption back into the capillaries?

65
Which catecholamine receptor regulates vascular smooth muscle tone via the IP3 and DAG second messenger systems?

76
A decrease in blood pressure will decrease baroreceptor activity which leads to?

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58
Ventricular filling primarily occurs during which phase?

51
The process of depolarization differs among skeletal muscle fibers, cardiac muscle fibers, and cardiac autorhythmic fibers in terms of Na, K and Ca ion movements. A plateau in the action potential due to opening of slow Ca channels is characteristic of which cell?

56
The Frank-Starling mechanism describes the relationship:

68
The hormone that directly regulates kidney Na reabsorption and is important to long-term blood pressure regulation is?

70
The most important determinant of "long term" regulation of blood pressure would be

61
The first heart sound or "lub" of the "lub-dup" represents which event?

54
The adrenergic receptors that directly mediate increases in heart rate and contractility of the heart are classified as: