PHYSIOLOGY
GASTROINTESTINAL PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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mouth
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stomach
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small intestine
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colon
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Detailed explanation-1: -Statement 1: Stomach secretes hydrochloric acid to kill bacteria.
Detailed explanation-2: -Acid is secreted by parietal cells in the proximal two thirds (body) of the stomach. Gastric acid aids digestion by creating the optimal pH for pepsin and gastric lipase and by stimulating pancreatic bicarbonate secretion.
Detailed explanation-3: -Two types of glands exist in the gastric mucosa that aid in chemical digestion: oxyntic glands and pyloric glands. Oxyntic glands are located in the body of the stomach and contain parietal cells and chief cells. Parietal cells secrete hydrochloric acid, concentrated to approximately 160 mmol/L and a pH of 0.8.
Detailed explanation-4: -Gastric juice is a unique combination of hydrochloric acid (HCl), lipase, and pepsin. Acidic gastric juice is found in all vertebrates, and its main function is to inactivate microorganisms.