Some neurons in the vagus nerve have synaptic connections to sinoatrial cells (pacemaker)in the heart.These neurons secrete acetylcholine,which ultimately results in a decreased heart rate.This is an example of
A)endocrine control.
B)exocrine control.
C)hormonal control.
D)neural control.
E)paracrine control.

Question

Quizplus · Accepted Answer

This is an example of neural control, where neurons in the vagus nerve send signals to the heart to decrease heart rate through the secretion of acetylcholine. Endocrine control involves the release of hormones into the bloodstream to regulate body functions, exocrine control involves the secretion of substances outside of the body, hormonal control is another term for endocrine control, and paracrine control involves the release of signaling molecules that act locally on nearby cells.

Some Neurons in the Vagus Nerve Have Synaptic Connections to Sinoatrial