What is the usual cause of heartburn?
A)backflow of chyme from the stomach into the esophagus
B)retention of food at the bottom of the esophagus by a sphincter that is reluctant to open
C)irritation of the lower esophagus by substances in spicy food
D)compression of the lower esophagus by an overfilled stomach

Question

Quizplus · Accepted Answer

Heartburn is typically caused by the backflow of stomach acid (chyme) into the esophagus, which irritates the esophageal lining.

What Is the Usual Cause of Heartburn