mechanism is responsible for production of concentrated urine.
A
Co-current
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B
Counter currrent
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C
Reabsorption
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D
Secretion
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Solution
The correct option is B Counter currrent Counter current mechanism in Henle's loop and vasa recta helps to maintain the concentration gradient in the medullary interstitium. Presence of such intersititial gradient helps an easy passage of water from the collecting tubule thereby concentrating the urine.