1.

Sympathetic drive to the heart is increased A. In exercise. B. In excitement. C. In hypotension. D. When parasympathetic drive is decreased. E. During a vasovagal attack.

Answer»

A. True -adrenergic blocking drugs reduce exercise tachycardia. 

B. True The tachycardia during excitement is also reduced by -blocking drugs. 

C. True A reflex response to decreased stretch of arterial baroreceptors. 

D. False The two systems can function independently. 

E. False Parasympathetic drive slows the heart during a vasovagal attack; sympathetic drive may stimulate the heart during recovery.



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