问题
选择题
正常成年人每天形成的原尿约150L，而每天的排尿量仅为1.5L，这是由于
A．肾小球的滤过作用
B．肾小管的重吸收作用
C．肾小囊的重吸收作用
D．肾单位的渗透作用
答案
答案：B
原尿在肾小囊中，当流到肾小管时，全部的葡萄糖、大部分的水和部分无机盐会被重吸收送回血液，所以尿液的量会远远少于原尿的量。
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正常成年人每天形成的原尿约150L，而每天的排尿量仅为1.5L，这是由于
A．肾小球的滤过作用
B．肾小管的重吸收作用
C．肾小囊的重吸收作用
D．肾单位的渗透作用
答案：B
原尿在肾小囊中，当流到肾小管时，全部的葡萄糖、大部分的水和部分无机盐会被重吸收送回血液，所以尿液的量会远远少于原尿的量。
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