Question

Which of these would result in an increase in the osmolarity of urine? a) increased levels of aldosterone in the plasma b) increased levels of vasopressin in the plasma c) decreased transport of Na+ and Cl- by the ascending limb of the loop of Henle d) ingestion of a large volume of pure water e) decreased urea permeability of the medullary collecting duct.

Answer 1

Answer: Option D

Explanation:

When osmolarity of unrine increases, this makes the body to produce antidiuretic hormone(ADH). The kidney then keeps more water and ingest more water inside the body and this result in a highly concentrated urine. But if there is low osmolarity of urine, anti diuretic hormone is not produced, water is not ingested, the urine and blood will remain diluted.