Question

Descending loop of Henle is for

• A. Absorption of $N{a}^{+}$
• B. Maintaining water balance
• C. Release of urea
• D. Absorption of NH${}_3$

Answer 1

Answer: (B)

Maintaining water balance

The structure of nephrons in the mammalian kidney is comprised of glomerular apparatus, PCT, Henle's loop and DCT. The Henle's loop is responsible for the reabsorption of water and salts. The descending limb is permeable to water and the reabsorption of the water takes place which concentrates the filtrate. This region is impermeable to the salts or ions. The ascending limb is permeable to salts and impermeable to water. Henle's loop is the region which is mainly involved in maintaining the water balance, concentration and the volume of blood.

Thus, the correct answer is option A.