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为什么胃不会消化自己?

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为什么胃不会消化自己?

胃能够分mi胃酸和胃dan白酶,消化rou类食wu中的dan白质,把它变成人ti的营养wu质。而胃本shen也是由dan白质组成的,为什么胃本shen不被消化呢?科学家们发现胃还能分mi一zhong黏稠的、胶冻状的黏yewu质,覆盖在胃的内表面,防止胃酸和胃dan白酶的腐蚀。此外,胃内表面黠mo的上pi细胞,是一层jin密排列的特殊结构,从而形成了一dao生理屏障。这zhong屏障可以阻止胃酸侵入。只要黏yemo和胃黏mo生理屏障这两dao"防线"健全,就能抵御胃自shen的分解。

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