Which of the following is a FALSE statement regarding hemodynamic changes occurring during exercise?
AVenous return is augmented by the pumping action of skeletal muscles.
BEnd-diastolic volume increases in the failing heart during exercise.
CVenoconstriction in exercising muscles as well as increased cardiac output leads to marked increase in systemic blood pressure.
DThe increased adrenergic nerve impulses to the heart as well as an increased concentration of circulating catecholamines help to augment the contractile state of the myocardium.
Which of the following causes coronary vasodilation?
AAdenosine
BNoradrenergic stimulation
CHypocarbia
DNone of the options
If the contractility of the heart is decreased, which of the following is seen ?
AIncreased ejection fraction
BIncreased stroke work
CDecreased stroke volume
DIncreased cardiac output
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