Question

Vassopressin released from the neurohypophysis is mainly responsible for

• A. Facultative reabsorption of water through DCT
• B. Obligatory reabsorption of water through PCT
• C. Facultation reabsorption of water through Henle loop
• D. Obligatory reabsorption of water through Bowman's capssule

Answer 1

The correct option is A Facultative reabsorption of water through DCT

Vasopressin also known as ADH (Antidiuretic hormone) is responsible for the reabsorption of water from the DCT, collecting tubule and collecting duct by making the walls more permeable to water. It is facultative reabsorption as it takes place according to the requirement of the body. For example, water reabsorption from DCT will occur if amount of water in the body is less and thus the urine passed will be concentrated.

Thus, the correct answer is option A.