Match the effects with sympathetic or parasympathetic stimulation (or neither) of the heart. (Options may be used more than once or not at all.)
-decreases the rate of depolarization to threshold of the SA node
A)effect caused by sympathetic stimulation
B)effect caused by parasympathetic stimulation
C)not brought about by either sympathetic or parasympathetic stimulation

Question

Quizplus · Accepted Answer

This effect is caused by parasympathetic stimulation, which releases acetylcholine and slows down the depolarization of the SA node.

Answer: A 
 This effect is caused by sympathetic stimulation, which releases norepinephrine and increases the rate of depolarization to threshold of the SA node.

Answer: C 
 This effect is not brought about by either sympathetic or parasympathetic stimulation.

Match the Effects with Sympathetic or Parasympathetic Stimulation (Or Neither)