来自《耶鲁大学开放课程：生物医学工程探索 第17集 第17集》
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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 -
and so sodium is going to accumulate out here.而且钠会在这里积累 -
Now, where does that sodium go?那么 这些钠之后再会去哪里 -
Well, eventually it's going to back into the blood最终它会回到血液 -
so there must be a lot of blood vessels around there as well.所以钠聚集区的周围一定有许多血管 -
They're not shown in this diagram;它们在这幅图中没有被显示出来 -
they'll be shown in the next one.下幅图会有所表示 -
This sodium leaves the urine through the walls of the tubules钠会通过小管壁离开尿液