cambronemily6822 cambronemily6822

13-12-2022
Biology

contestada

Acid reflux into the esophagus ("heartburn") is normally prevented by __________.
A) pharyngeal constrictors
B) the upper esophageal sphincter
C) the lower esophageal sphincter (LES)
D) esophageal glands
E) pharyngeal and buccal sphincters

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