C h a p t e r 1 7
Control of Cardiovascular Function
401
3.
Use events in the cardiac cycle depicted in Figure
17-11 to explain:
A.
The effect of hypertension on the isovolumetric
contraction period.
B.
The effect of an increase in heart rate on the
time spent in diastole.
C.
The effect of an increase in the isovolumetric
relaxation period on the diastolic filling of the
ventricle.
4.
Use the Frank-Starling ventricular function curve
depicted in Figure 17-16 to explain the changes
in cardiac output that occur with the following
changes in respiratory effort:
A.
What happens to cardiac output during
increased inspiratory effort in which a marked
decrease in intrathoracic pressure produces an
increase in venous return to the right heart?
B.
What happens to cardiac output during
increased expiratory effort in which a marked
increase in intrathoracic pressure produces a
decrease in venous return to the right heart?
C.
Given these changes in cardiac output that occur
during increased respiratory effort, what would
you propose as one of the functions of the
Frank-Starling curve?
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