Major components of gastric juice

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Pepsinogen

Comes from cheif cells of gastric glands. Inactive form of pepsin.

Mucus

Comes from mucous cells. Provides a viscous, alkaline protective layer on the stomaches inner surface.

Hydrochloric acid

Comes from parietal cells of gastric glands. Provides the acid environment needed for production and action of pepsin.

Intrinsic factor

Comes from parietal cells of the gastric glands. AIDS in vitamin B12, absorption in the small intestine.

Pepsin

Comes from pepsinogen in the presence of hydronic acid. A protein splitting enzyme that digests nearly all types of dietary protein into polypeptides.


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