WITH regard to resistance in the cardiovascular system, the parameter with the largest effect is:
a) vessel length
b) radius
c) heart rate
d) viscosity
e) pressure - ANSWERb) radius
An increase in cardiac sympathetic activity would most likely and immediately:
a) increase stroke volume
b)...
With regards to the Frank-Starling law of the heart, an increase in venous return to the heart will
result in:
a) increased sympathetic activity
b) an increase in end diastolic volume
, c) decreased cardiac output
d) a decrease in stroke volume
e) decreased angiotensin - ANSWERb
Electrical stimulation of the vagus nerve would result in:
a) tachycardia
b) decreased inotropy
c) increased cardiac output
d) bradycardia
e) activation of arterial baroreceptors - ANSWERd) bradycardia
A decrease in arterial blood pressure would most likely and immediately lead to:
a) increased afterload
b) decreased afterload
c) increased stroke volume
d) vasodilation
e) a decrease in sympathetic nerve activity - ANSWERb
An increase in blood pressure results in:
a) decreased firing rate in the aortic baroreceptor nerve
b) increased heart rate
c) activation of chemoreceptors
d) an increase in sympathetic nerve activity
e) increased firing rate in the aortic baroreceptor nerve - ANSWERe
In terms of the structural organisation of the cardiovascular system, the factor contributing most to
blood pressure is:
a) angiotensin II
b) the parallel arrangement of the vascular beds
c) low resistance in the arterioles
d) the serial arrangement of the vascular beds
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