Moderate

Preganglionic parasympathetic fibers are_______________?

Correct answer: D. Cholinergic

  • A. Somatic only
  • B. Parasympathetic
  • C. Sympathetic
  • D. Cholinergic

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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