Question

The function of counter current mechanism in kidney is

• A. To conserve water
• B. To remove excess water
• C. To conserve solute
• D. To convert amino acid into urea

Answer 1

The correct option is A To conserve water

The flow of filtrate in the two limbs of Henle’s loop is in opposite directions and thus forms a counter current. The flow of blood through the two limbs of vasa recta is also in a countercurrent pattern. The proximity between the Henle’s loop and vasa recta, as well as the countercurrent in them, help in the formation of hypertonic urine and conserve water. Hence, the function of counter current mechanism in kidney is to conserve water.

So,the correct answer is 'To conserve water'