A resident with gastroesophageal reflux disease (GERD) experiences heartburn. The nurse explains this occurs because of malfunction of which anatomical structure?

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Multiple choice — select the best answer

ALower esophageal sphincter
BPyloric sphincter
CIleocecal valve
DCardiac sphincter of the stomach fundus

✓ Correct answer: A. Lower esophageal sphincter The lower esophageal sphincter (LES) normally prevents stomach acid from flowing back into the esophagus. In GERD, the LES relaxes inappropriately or weakens, allowing acidic gastric contents to reflux into the esophagus, causing heartburn.

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A resident with gastroesophageal reflux disease (GERD) experiences heartburn. The nurse explains this occurs because of malfunction of which anatomical structure?

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