HISTOLOGY
DIGESTIVE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the mouth
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the stomach
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the pancreas
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the gall bladder
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Detailed explanation-1: -Gastric chief cells secrete pepsin as an inactive zymogen called pepsinogen. Parietal cells within the stomach lining secrete hydrochloric acid that lowers the pH of the stomach. A low pH (1.5 to 2) activates pepsin.
Detailed explanation-2: -Pepsinogen is secreted from peptic (or chief) cells in the oxyntic gland. Some pepsinogen is also secreted from mucosal cells in the gastric antrum and the duodenum. In the presence of gastric acid this proenzyme is converted into active pepsin, which itself catalyzes further conversion from pepsinogen.
Detailed explanation-3: -Rennin is secreted by the cells of stomach in inactive form as prorennin and then activated to Rennin by HCl. Rennin is produced only in infants. The enzyme helps in the curdling of the milk, which helps in the slow digestion and complete absorption of nutrient.