Composition Of Gastric Juice ComponentSourceFunction PepsinogenChief CellsInactive Protease PepsinPepsinogen Protease (activated by HCl) HClParietal Cells Acid Environment Activation of Pepsin Mucus Mucous Cells Goblet Cells Viscous, Alkaline Protective Layer Intrinsic FactorParietal Cells Vitamin B 12 Absorption
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