why does not lining of stomach wall dissolve in such an acidic pH
Answers
The stomach wall is protected by an innermost layer of substance called mucosa. It’s a simple epithelial tissue. These mucus cells found throughout the stomach lining secrete mucus which protects the stomach from the strong acidic action of Hydrochloric Acid. Mucus contain Bicarbonate ions (HCO3) - As these bicarbonate ions are alkaline in nature, they neutralise the effect of this strong Hydrochloric Acid. Thus the continuous secretion of these bicarbonate ions protects the stomach from being digested by hydrochloric acid.
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The lining of the stomach wall has gastric glands that secrete an acidic solution.
Explanation:
- This acid creates a low pH environment in the stomach. The mucosa or the lining of the stomach wall does not get digested as it secretes hydrochloric acid from the parietal cells. The pH in the parietal cells remains near neutrality.
- Also, the goblet cells in the mucosa secrete protective mucus in large quantities that line the mucosal surface. The layer of the mucus traps basic electrolytes thereby neutralizing hydrochloric acid that penetrates the mucus.
To learn more:
1. No food is absorbed in stomach.Why?:
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2. Why should be the shape of stomach like a bag but not like a tube:
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