ANIMAL PHYSIOLOGY
DIGESTION IN DIFFERENT ANIMALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Its cells secrete the protease enzyme pepsin.
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It is a saclike organ that evolved to store food.
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It is the initial site of protein digestion.
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Absorption of many nutrients occurs there.
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Detailed explanation-1: -Stomach in vertebrates is the main site for digestion of proteins. Pepsin is the chief proteolytic enzyme of stomach secreted in the inactive form called as pepsinogen. The pepsinogen is activated to pepsin in presence of hydrochloric acid secreted in stomach by oxyntic or parietal cells.
Detailed explanation-2: -Final Answer: Stomach is the site of digestion mainly of proteins.
Detailed explanation-3: -Answer and Explanation: The correct statement about digestion and absorption of proteins is C) small intestine cells break dipeptides and tripeptides into individual amino acids.
Detailed explanation-4: -Pepsin is a stomach enzyme that serves to digest proteins found in ingested food. 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.