How does the flow of blood in the vasa recta contribute to the production of a concentrated urine in mammals?

How does the flow of blood in the vasa recta contribute to the production of a concentrated urine in mammals?
  1. By transporting essential nutrients to the kidney
  2. By reabsorbing water in the cortex
  3. By maintaining a counter current pattern with the Henle’s loop
  4. By maintaining an acidic environment in the kidney

Solution

The flow of blood through the two limbs of vasa recta is in a counter current pattern which, along with the proximity between the Henle’s loop and vasa recta, helps in maintaining an increasing osmolarity towards the inner medullary interstitium.

Asked in: NCERT

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