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The Pharyngoesophageal Sphincter Is Normally Closed to Prevent

Question 96

Multiple Choice

The pharyngoesophageal sphincter is normally closed to prevent


A) air from entering the esophagus during breathing
B) gastric contents from refluxing back into the esophagus
C) vomiting
D) esophageal secretions from leaking into the stomach
E) food from entering the pharynx

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