Difficulty: Medium
Average Score: 80%
Simulated
The sympathetic nervous system postganglionic neuron releases what neurotransmitter?
Correct answer
C
Rationale
The correct answer is C: Norepinephrine. The sympathetic postganglionic neuron releases norepinephrine, which activates adrenergic receptors on target cells. Acetylcholine is released by the preganglionic neuron in both sympathetic and parasympathetic systems, not the postganglionic neuron. Therefore, choices A and B are incorrect. Arginine is not a neurotransmitter involved in the sympathetic nervous system, so choice D is also incorrect.