The epithelial cells lining the stomach of vertebrates are protected from the damage by HCI because :
Correct answer: D. The epithelial cells are covered by a mucus layer
- A. HCL is too dilute
- B. The epithelial cells are resistant to the action of HCL
- C. HCL is neutralized in the stomach
- D. The epithelial cells are covered by a mucus layer
Explanation
The epithelium of gastric glands (present in the stomach) consists of goblet cells that secrete mucus. Mucus forms a coating on the epithelial lining of the stomach and thus protects it from the action of HCL
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About Digestion
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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