Question

Protection of the walls of the stomach against the action of its own digestive juices:

• A. Results from the presence of an anti–enzyme chemical formed by the gastric glands
• B. Results from the nervous reactions of the lining of the stomach
• C. Is controlled by a centre in the medulla of the brain
• D. Results from the neutralizing, buffering, and a coating mucus covering its inner surface

Answer 1

The correct option is D Results from the neutralizing, buffering, and a coating mucus covering its inner surface

The stomach is protected from digestive enzymes and low pH by the neutralizing, buffering, and coating mucus secreted over its inner surface.
Gastric juice secreted by the inner linings of the stomach wall secrete mucus which gets deposited on the inner wall of the stomach to protect it from the acidic nature of HCl.