Countercurrent mechanism in the kidney is responsible for: (A) Absorption of glucose, (B) Maintenance of blood flow, (C) Osmotic gradient in medulla, (D) Secretion of uric acid
Answer is C. Ans. (c) Osmotic gradient in medulla(Ref: Ganong, 25th ed/p.685)Loop of Henle plays an important role in concentration of urine by creating medullary hyperosmolarity through countercurrent mechanism