Postganglionic sympathetic axons release the neurotransmitter ________ at their effector junctions.

Postganglionic sympathetic axons release the neurotransmitter ________ at their effector junctions.

Postganglionic sympathetic axons release the neurotransmitter ________ at their effector junctions.









A) acetylcholine
B) nitric oxide
C) norepinephrine
D) all of the above
E) none of the above












Answer: D