Question

Volume of urine is regulated by

• A. Aldosterone
• B. Aldosterone and ADH
• C. Aldosterone, ADH and testosterone
• D. ADH

Answer 1

Answer: (B)

Aldosterone and ADH

The concentration of urine is controlled by vasopressin by regulating the reabsorption of water in the collecting tubule. It is known as antidiuretic hormone released by the posterior pituitary. It triggers the release of aldosterone and increases the concentration of sodium ions in the blood. The increased salt concentration in the blood increases the blood osmotic potential which further increases the reabsorption of water into the collecting tubule and thus the urine released is the concentrated one. In the absence of vasopressin, the water absorption in the collecting tubules is less so the urine produced is dilute one.

So, the correct answer is 'ADH and aldosterone'.