A 50-year-old male patient comes to his primary care physician complaining of a chronic burning sensation in his chest
The pain is worse when lying down at night after a large meal, and can be alleviated to some degree by the use of over-the-counter antacids. The pain experienced by the patient is most likely due to dysfunction of which of the following gastrointestinal structures?
A. lower esophageal sphincter
B. pylorus
C. salivary glands
D. pancreas
E. gallbladder
ANS: A
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