which one of the following hormones stimulates the kidneys to retain water for the body? a. prolactin b. antidiuretic hormone c. luteinizing hormone d. somatotropin
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 absense of antidiuretic hormone, the collecting ducts are virtually impermiable to water, and it flows out as urine.