What effect does the parasympathetic nervous system have on heart rate?
A)at first decreases,then increases heart rate
B)decreases heart rate
C)no effect on heart rate
D)increases heart rate

Question

Quizplus · Accepted Answer

The parasympathetic nervous system has an inhibitory effect on the heart, leading to a decrease in heart rate. This is because the neurotransmitter acetylcholine released by the parasympathetic nervous system binds to muscarinic receptors on the heart, causing a decrease in the rate at which the heart beats.

What Effect Does the Parasympathetic Nervous System Have on Heart