Dehydration and Urine Dilution

[greenie]

During dehydration, would urine be most dilute in the ascending loop of Henle or the distal convoluted tubule? I know the ascending loop takes out a lot of the salt without allowing water to follow so would it be the ascending loop? Or would you say the distal convoluted tubule b/c it receives the diluted urine?

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[Cliff Huxtable]

The urine is most dilute in the DCT. Look on page 439 of FA2009. The DCT is also a diluting segment.