THORAX ABDOMEN AND PELVIS

MEDICAL

STOMACH

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

What prevents the gastric juices from digesting (breaking down) the stomach itself?

A	a thick layer of mucus protects the stomach lining
B	antacids found in the digestive enzymes
C	lipases and proteases
D	hydrochloric acid

Explanation:

Detailed explanation-1: -Mucuous is a thick fluid secreted by the inner lining of stomach. It protects the lining of the stomach from gastric juice, i.e., hydrochloric acid. Mucous itself protects the mucosal membrane of stomach from the auto-digestion.

Detailed explanation-2: -The epithelial cells of the gastric mucosa provide a strong barrier against penetration to protect the stomach against its own secreted acids and pepsin.

Detailed explanation-3: -In the stomach several mucosal defence mechanisms protect the stomach against hydrochloric acid and noxious agents. The pre-epithelial protection is made up by the mucus-bicarbonate barrier. Mucus and bicarbonate, secreted by mucus cells, create a pH gradient maintaining the epithelial cell surface at near neutral pH.

Detailed explanation-4: -Gastric mucus is a gel-mucous barrier secreted by epithelial cells and glandular cells in the stomach wall. It acts as part of a barrier that protects the stomach wall from the acid and digestive enzymes within the stomach lumen.

There is 1 question to complete.