how salt is concentrated in the kidney

[youngrace]

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i know that ions are concentrated through the kidney through the na+/k+/cl- apical symport in the thick ascending limb of the loop of henle; na+ goes in through facilitated diffusion, and brings in k+ and cl-. but how does the cell get rid of the na+ afterwards? i know k+ has leak channels that allow it to re-enter the lumen, but what about sodium? are there na+/k+ atpases in the basolateral side that pump na+ into the interstitial fluid?

 

[PiBond]

i know that ions are concentrated through the kidney through the na+/k+/cl- apical symport in the thick ascending limb of the loop of henle; na+ goes in through facilitated diffusion, and brings in k+ and cl-. but how does the cell get rid of the na+ afterwards? i know k+ has leak channels that allow it to re-enter the lumen, but what about sodium? are there na+/k+ atpases in the basolateral side that pump na+ into the interstitial fluid?

Yes, there's a basolateral Na+/K+ ATPase