What happens to ptylin in stomach?
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The amylase of the salivary gland (ptyalin) is inactivated by stomach acid. When food enters the stomach it is first stored in the fundus of the stomach and not mixed with acid, so ptyalin can carry on acting until mixing with stomach acid takes place. Amylase works in the pH of 6.9, whereas the pH in stomach is 2.
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