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Question

Protection of the walls of the stomach against the action of its own digestive juice

A
is controlled by a centre in the medulla of the brain.
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B
results from the nervous reactions of the lining of the stomach.
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C
results from the presence of an anti-enzyme chemical formed by the gastric gland.
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D
results from the neutralizing, buffering and coating mucus covering its inner surface.
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Solution

The correct option is D results from the neutralizing, buffering and coating mucus covering its inner surface.
Protection of the walls of the stomach against the action of its own digestive juice results from the neutralizing, buffering and coating mucus covering its inner surface by mucus and HCO3 or bicarbonate ions.

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