Preganglionic parasympathetic fibers are_______________?
Correct answer: B. Cholinergic
- A. Somatic only
- B. Cholinergic
- C. Sympathetic
- D. Parasympathetic
Explanation
All autonomic preganglionic neurons release acetylcholine, so preganglionic parasympathetic fibers are cholinergic. Their postganglionic fibers are also usually cholinergic, unlike most sympathetic postganglionic fibers.
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