What physiological mechanism may lead to the development of heartburn?
A) Inadequate closure of lower esophageal sphincter
B) Improper relaxation of the internal anal sphincter
C) Impaired closure of the ileocecal valve
D) Partial relaxation of the pyloric sphincter

Question

Quizplus · Accepted Answer

Heartburn is primarily caused by the inadequate closure of the lower esophageal sphincter (LES), which allows stomach acid to reflux back into the esophagus, leading to irritation and the sensation of heartburn.

What Physiological Mechanism May Lead to the Development of Heartburn