what is the role of adh (antidiuretic hormone) in regulating salt and water concentrations in the blood?
What is being tested? Antidiuretic hormone (ADH), also called arginine vasopressin (AVP), is a hormone that helps regulate water balance in the body by controlling the amount of water the kidneys reabsorb while they are filtering wastes out of the blood. This test measures the amount of ADH in the blood.