1. Tardigrade
  2. Question
  3. Biology
  4. Assertion (A) HCl present in the gastric juices, maintains a strong pH (1.5-2.5) in the stomach, but does not digest the walls of stomach and duodenum. Reason (R) Protection to intestinal wall and stomach from the actions of HCl is provided by the mucus secreted by goblet cells, bicarbonates from pancreas, mucus and bicarbonates from Brunner's gland.

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Q. Assertion (A) $HCl$ present in the gastric juices, maintains a strong $pH (1.5-2.5)$ in the stomach, but does not digest the walls of stomach and duodenum.
Reason (R) Protection to intestinal wall and stomach from the actions of $HCl$ is provided by the mucus secreted by goblet cells, bicarbonates from pancreas, mucus and bicarbonates from Brunner's gland.

Digestion and Absorption

Solution:

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
IHydrochloric acid present in the gastric juices maintains a strong $pH$ in stomach. But the wall of stomach is not digested by its action because goblet cells secrete mucus which continuously lubricates the innermost layer in the stomach and intestine. The wall is also protected by the bicarbonates secreted by pancreatic juices and Brunner's gland.