Which pa of Henle loop is less permeable to water?: (A) Thin descending limb, (B) Thin ascending segment/limb., (C) Thick ascending segment/limb., (D) Thick descending segment/limb.
Answer is B. Thin ascending segment/limb.REABSORPTION IN THIN ASCENDING LIMB:NaCl- reabsorption occurs -Due to high NaCl- permeability.Less permeable to water.Tubular fluid is iso-osmotic.