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The gastric juice needs to be acid so that it can break down the food to go to the intestine. The muscles of the stomach wall contract vigorously so that the food is mixed with the gastric juice. Pepsinogen is made by the presence of gastric juice. This digests protein. Seeing, smelling, tasting or thinking about food starts the production of gastric juice.

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โˆ™ 2007-11-09 13:39:41
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Q: What are the composition and functions of gastric juice?
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