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Vasopressin, also known as arginine vasopressin (AVP), antidiuretic hormone (ADH), or argipressin, is a neurohypophysial hormone found in most mammals.Its two primary functions are to retain water in the body and to constrict blood vessels.asopressin regulates the body's retention of water by acting to increase water reabsorption in the kidney's collecting ducts, the tubules which receive the very dilute urine produced by the functional unit of the kidney, the nephrons.
Lesson Summary. ADH is antidiuretic hormone and is also called vasopressin. It's responsible for regulating the amount of water in the blood, and is released from the pituitary gland based on signals from the hypothalamus, which detects the water levels in the blood.esson Summary. ADH is antidiuretic hormone and is also called vasopressin. It's responsible for regulating the amount of water in the blood, and is released from the pituitary gland based on signals from the hypothalamus, which detects the water levels in the blood.