Question

Gastric juice does not typically cause a burning sensation within the stomach. But reflux of gastric juice into the esophagus can cause a burning sensation. One reason for the burning sensation caused by the gastric reflux is that the esophagus ______.
secretes mucus that is not identical to stomach mucus
is internally lined by epithelial cells that are in direct physical contact with the contents of the esophagus
has enzymes that react with stomach acid to cause a burning sensation
none of the listed responses is correct

Answer 1

Answer:

None of the listed answers is correct

Explanation:

During normal digestion,  the esophagus  which is a muscle ring called the lower esophageal sphincter (LES) opens to allow food to pass into the stomach and then quickly closes to prevent backflow into the esophagus. When the LES has a malfunction, contents from the stomach, including food and digestive juices, such as hydrochloric acid, can push up into the esophagus creating gastric acid.