<prompt> Countercurrent mechanism in the kidney is responsible forAbsorption of glucoseMaintenance of blood flowOsmotic gradient in medullaSecretion of uric acid  <response>: Ans. c Osmotic gradient in medullaRef: Ganong, 25th edp.685Loop of Henle plays an important role in concentration of urine by creating medullary hyperosmolarity through countercurrent mechanism 