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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.
Antidiuretic hormone, ADH or vasopressin. The antidiuretic hormone, ADH, also called vasopressin and arginine-vasopressin, is a nanopeptide (nine amino acids) synthesized in the hypothalamus, transported to and stored in the posterior lobe of the pituitary gland which releases it into the blood circulation.It has antidiuretic and vasopressor actions.ormed in the supra-optic and paraventricular nuclei of the hypothalamus by cleavages of a preprohormone of 168 amino acids and then a prohormone, vasopressin is transported to the posterior lobe of the pituitary gland which stores it.