The kidney does this by the processes of filtration, reabsorption, and secretion in the nephron.

肾脏依靠肾单位过滤、重吸收、分泌等过程行使调节功能。

Most other causes, though have to do with the kidney's ability to regulate what stays in the blood and gets excreted into the urine, and the kidney does this by the processes of filtration, reabsorption, and secretion.

大部分其他原因，和肾脏调节保持钾在血中还是被排泄入尿液的能力有关，肾脏通过肾单位中的滤过、重吸收和分泌来完成。