Which neurotransmitter is primarily excitatory for gastrointestinal smooth muscle?
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Correct answer: Acetylcholine
Acetylcholine increases smooth muscle contraction in the gut. It enhances peristaltic activity and motility.
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More Motility and peristalsis questions
- Which movement is characteristic of the colon to propel feces over long distances?
- Relaxation ahead of the peristaltic wave is mediated mainly by:
- Which factor most strongly initiates peristalsis in the intestine?
- The law of the intestine states that peristalsis proceeds:
- Which structure prevents reflux of gastric contents into the esophagus?
- Which gastrointestinal movement predominates in the esophagus?