(redirected from Anti-diuretic hormone)
Also found in: Dictionary, Thesaurus, Medical.
Related to Anti-diuretic hormone: diabetes insipidus, antidiuretic hormone deficiency


(văz'ōprĕs`ĭn): see antidiuretic hormoneantidiuretic hormone
, polypeptide hormone secreted by the posterior pituitary gland. Its principal action is to regulate the amount of water excreted by the kidneys. Antidiuretic hormone (ADH), known also as vasopressin, causes the kidneys to resorb water directly from the
..... Click the link for more information.



a hormone secreted by the posterior lobe of the hypophysis; causes constriction of vessels (acting on the smooth muscles of their walls) and increased blood pressure (pressor effect); also maintains at a proper level the reverse absorption of water in the straight tubules of the kidneys, that is, decreases the quantity of urine discharged (antidiuretic effect). Vasopressin is formed in the neurosecretory cells of the anterior nuclei of the hypothalmus, from which it enters the hypophysis along the nerve fibers. The antidiuretic action of the hormone is one of the factors that maintain the relative constancy of the water-salt metabolism in the bodies of vertebrate animals and man. A deficiency of vasopressin may lead to diabetes insipidus, in which discharge of urine is sharply increased. Vasopressin is contained in preparations obtained from the posterior hypophysis—Pituitrin and adiurekrin. Chemically, vasopressin is an octapeptide constructed of eight amino acids (in the majority of animals and in humans vasopressin consists of cysteine, tyrosine, phenylalanine, glutamine, asparagin, proline, arginine, and glycine; in pigs lysine is found instead of arginine). In structure and effect vasopressin is similar to another hormone of the hypophysis—oxytocin.



A peptide hormone which is elaborated by the posterior pituitary and which has a pressor effect; used medicinally as an antidiuretic. Also known as antidiuretic hormone (ADH).
References in periodicals archive ?
An anti-diuretic hormone is sent to the kidneys to limit the volume of urine produced.
The pituitary secretes growth hormone (GH), prolactin, corticotrophin, luteinizing hormone, follicle stimulating hormone, thyrotropin, and anti-diuretic hormone (Rang & Dale, 1991).
Furthermore, dilutional hyponatraemia may be caused by inadequate anti-diuretic hormone secretion or central nervous disease, neoplasms with ectopic hormone production, pulmonary disease and endocrine disease (4,5).
It then sends a signal, through the anti-diuretic hormone which is released from the pituitary gland and reduces the amount of water lost in urine, to eliminate the excess water through the kidneys.

Full browser ?