Which of the following is the main role of hydrochloric acid (HCl) in the stomach?
Creates acidic conditions
Hydrochloric acid is secreted by the gastric glands (by the parietal cells) in the wall of the stomach. Its main role is to create a strongly acidic medium in the stomach, with a pH of about 1.5 to 3.5.
This acidic medium activates pepsinogen into the enzyme pepsin, which needs acid to digest proteins, and it also kills most of the bacteria and other microbes that enter with food.
Bile is produced by the liver and stored in the gall bladder, not by HCl. Digested nutrients are absorbed mainly by the villi of the small intestine. Fats are emulsified by bile and digested by lipase enzymes, not broken down directly by hydrochloric acid.
Hence, Creates acidic conditions.
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