Suppose you are developing a new drug, and have found that when it is administered in humans there is a substantial increase in the volume of urine produced. When you administer antidiuretic hormone (ADH or vasopressin) at the same time, the volume of urine returns to normal. Which hypothesis best fits these observations ? The new drug ?
A. Block the receptors for ADH on the collecting of the kidney.
B. Blocks the release of ADH from the pituitary
C. Mimics the action of ADH
D. Decreases blood pressure
