Reflux of gastric contents into the esophagus occurs because of

A. increased amounts of mucus produced by the stomach.
B. increased hydrochloric acid production by the parietal cells.
C. relaxation of the cardiac sphincter.
D. spasms of the submucosal layer of the stomach wall.
E. contraction of the pyloric sphincter.


Answer: C

Anatomy & Physiology

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