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Q.
Which of the following factors is responsible for the formation of concentrated urine ?
NEETNEET 2019Excretory Products and their Elimination
Solution:
The proximity between loop of henle and vasa recta as well as counter current in them help in maintaining an increasing osmolalrity towards the inner medullary interstitium. This mechanism help to maintain a concentration gradient in medullary interstitium so human urine is nearly four times concentrated than initial filtrate formed.