In particular, the cells of these tubules are able

特别是小管的细胞它们可以从滤液中
to reabsorb the molecules that you need.

重吸收你所需要的分子
They reabsorb a lot of water, they reabsorb a lot of sodium,

小管的细胞会重吸收大量的水大量的钠
potassium, bicarbonate, and they do that

钾碳酸氢盐并且它们不会重吸收
without reabsorbing a lot of the waste products you don't need like urea;

太多的废物例如你不需要的尿素
as you might guess given this configuration that

关于这个构造正如你会猜测的那样
there's some interplay between the activities

发生在不同小管部位的生理活动之间
that happen at different parts of the tubule.

会有一些相互影响
That is, if sodium is being reabsorbed in the proximal tubule,

这就是说如果钠被近曲小管吸收
which it is, then where does that sodium go?

事实上也的确如此这些钠会去哪里
It's pumped out of the tubule and into the space around--

它会从小管泵出并进入
into the space of the kidney surrounding it

肾脏周围的空间