Select the incorrect statement about the parasympathetic nervous system.
A) It inhibits all cardiac muscle and smooth muscle.
B) Neurotransmitter from all its postganglionic fibers bind to muscarinic receptors.
C) Neurotransmitter from all its preganglionic fibers bind to nicotinic receptors.
D) Part of it originates in the brain and part of it originates in the sacral region of the spinal cord.
E) It inhibits all cardiac muscle and smooth muscle, and neurotransmitter from all its postganglionic fibers bind to muscarinic receptors.

Question

Quizplus · Accepted Answer

The incorrect statement is that the parasympathetic nervous system inhibits all cardiac muscle and smooth muscle. In reality, it stimulates smooth muscle in the digestive tract and urinary bladder, and it slows down the heart rate (but does not completely inhibit it). The other statements are correct.

Select the Incorrect Statement About the Parasympathetic Nervous System