来自李燕的问题
下列几种物质中，不经消化就可被小肠直接吸收进入血液的是（）A.淀粉B.葡萄糖C.脂肪D.蛋白质
下列几种物质中，不经消化就可被小肠直接吸收进入血液的是（）
A.淀粉
B.葡萄糖
C.脂肪
D.蛋白质
1回答
2020-06-09 19:01
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陈子辰
淀粉的消化从口腔开始，口腔中的唾液淀粉酶能够将部分淀粉分解为麦芽糖，当淀粉和麦芽糖进入小肠后，由于小肠中的胰液和肠液中含有消化糖类的酶，因此，淀粉等糖类物质在小肠内被彻底消化为葡萄糖；蛋白质的消化是从...
2020-06-09 19:02:29
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