Secondary peristalsis in the esophagus is distinguished from primary peristalsis because it:
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Correct answer: Is triggered by local distension of the esophagus
Primary peristalsis is a continuation of the swallowing reflex. Secondary peristalsis occurs if a food bolus becomes stuck; the resulting distension triggers a local enteric reflex and vagovagal reflex to clear the esophagus without a second swallow.
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