If sympathetic and parasympathetic neurons both release acetylcholine (ACh),how can they have antagonistic effects? (Check all that apply.)
A)The target cells of each set of neurons respond differently to the same signal.
B)Each type of neuron secretes ACh bound to a different co-neurotransmitter.
C)Sympathetic neurons activate the adrenal gland,causing secretion of epinephrine.
D)The neurons release different forms of ACh.
E)Parasympathetic neurons activate the adrenal gland,causing secretion of epinephrine.

Question

Quizplus · Accepted Answer

Even though both sympathetic and parasympathetic neurons release ACh, the target cells of each set of neurons respond differently to the same signal. For example, sympathetic neurons release ACh that binds to nicotinic receptors on the chromaffin cells in the adrenal medulla, causing them to secrete epinephrine and norepinephrine, while parasympathetic neurons release ACh that binds to muscarinic receptors on target cells. Additionally, sympathetic neurons also activate the adrenal gland, causing secretion of epinephrine, which can have antagonistic effects compared to the actions of the parasympathetic nervous system.

If Sympathetic and Parasympathetic Neurons Both Release Acetylcholine (ACh),how Can