Question

ADH causes which one of the following?

• A. Increase in reabsorption of water
• B. Decrease in reabsorption of water
• C. Maintenance of equilibrium of Na and Ca ion balance
• D. Maintenance of equilibrium of K ion and carbonate pump

Answer 1

The correct option is A Increase in reabsorption of water

Vasopressin also known as antidiuretic hormone (ADH), is a neurohypophysial hormone found in most mammals. Its two primary functions are to retain water in the body and to constrict blood vessels. Antidiuretic hormone binds to receptors on cells in the collecting ducts of the kidney and promotes reabsorption of water back into the circulation. In the absence of antidiuretic hormone, the collecting ducts are virtually impermeable to water, and it flows out as urine.