Which of the following is false about lower esophageal sphincter

A. Relaxation is mediated by VIP and nitrous oxide

B. Resting pressure is 10 to 25 mmHg

C. Pinch cock action of diaphragm protects against reflex

D. Abnormal relaxation will cause achalasia

Correct Answer: Abnormal relaxation will cause achalasia

Description: Relaxation will cause GERD Failure to relax will cause achalasia

Category: Surgery

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