Discussion
The highly acidic pH of gastric juice is due to :
Answer: B
The acidity is due to Hydrochloric acid.
The parietal cells of the gastric glands secrete hydrochloric acid, which gives gastric juice a pH of about 1.5 to 3.5. The acid kills many swallowed microbes and activates pepsinogen to pepsin for protein digestion.
Citric acid occurs in citrus fruits, acetic acid in vinegar, and carbolic acid (phenol) is a disinfectant. None is secreted by the stomach.
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