水喝到肚子里之后,多久才会变成尿液排出来

2025-03-28 11:59:44
推荐回答(1个)
回答1:

水喝进体内,在血液流经肾小球时,除了血细胞和大分子的蛋白质外,血浆中的一部分水、无机盐、葡萄糖和尿素的物质,都可以经过肾小球滤过到肾小囊腔中,形成原尿。肾小
管重新吸收原尿中的大部分水、全部葡萄糖和部分无机盐等物质。而剩下的废物如尿酸、尿素、一部分水和无机盐,则由肾小管流出,形成尿液。总结下说,经过一系列新陈代谢作用,有一部分水会变成汗液,流汗时就流出来了;还有一些水会变成人体所需的水分而保存在体内,但那是很少的,人体70%都是水分......总之,水从多个途径分散。人体吸收水分是很迅速的,而排泄的时间是因人而异的。
一般约经过2-3小时才能完成。最后回答你的问题:喝下去的水,多久会变成尿排出来。若运动量大的尿液会很少很慢甚至没有排除(个体差异,在2-3小时);正常状态,幼儿会快(半个小时之后),青年人会慢些(1个小时之后),老年人更慢;同一时间大量饮水的会多且快、频。

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