Question

49 multiple choice 10 points heartburn is usually caused by the effects of gastric juice on the____ esophagus heart stomach small intestine

Explanation:

Heartburn occurs when stomach - acid (gastric juice) flows back up into the esophagus, irritating its lining. The heart is not directly affected by gastric juice in this context. The stomach is where gastric juice is produced and the small intestine is not the site of heartburn from gastric - juice effects.

Answer:

esophagus