Q:

Sympathetic drive to the heart is increased

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Sympathetic drive to the heart is increased.


  1. In exercise.
  2. In excitement.
  3. In hypotension.
  4. When parasympathetic drive is decreased.
  5. During a vasovagal attack.

All Answers

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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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