Which is the critical feature that enables the mammalian kidney to concentrate urine?

Question

Quizplus · Accepted Answer

Nephrons with long loops of Henle are the critical feature that enables the mammalian kidney to concentrate urine. This is because the longer the loop of Henle, the more time the filtrate spends in contact with the hypertonic interstitial fluid in the renal medulla, allowing for greater reabsorption of water and concentration of urine.

Which Is the Critical Feature That Enables the Mammalian Kidney