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a hormone secreted by cells of the hypothalamic nuclei and stored in the posterior pituitary for release as necessary; it stimulates contraction of the muscular tissues of the capillaries and arterioles, raising the blood pressure, and increases peristalsis, exerts some influence on the uterus, and influences resorption of water by the kidney tubules, resulting in concentration of urine. Its rate of secretion is regulated chiefly by the osmolarity of the plasma. Also prepared synthetically or obtained from the posterior pituitary of domestic animals; used as an antidiuretic. Called also antidiuretic hormone.
arginine vasopressin vasopressin containing arginine, as that from humans and most other mammals; for medicinal uses, see vasopressin. Called also argipressin.
ar·gi·nine va·so·pres·sin (AVP),[MIM*192340]
vasopressin containing an arginyl residue in position 8 (as in chickens and most mammals, including humans); porcine vasopressin has a lysyl residue at position 8. All are vasopressors.
vasopressin containing arginine, as that from humans and most other mammals; for medicinal uses. Also called argipressin.
arginine vasopressinADH-antidiuretic hormone, see there.
ar·gi·nine va·so·pres·sin(AVP) (ahr'ji-nēn vā'sō-pres'in)
This agent contains an arginyl residue in position 8 (as in chickens and most mammals, including humans); porcine vasopressin has a lysyl residue at position 8. All are vasopressors.
arginine vasopressinVASOPRESSIN, one of the two hormones from the rear lobe of the PITUITARY GLAND. The antidiuretic hormone in humans.
a basic amino acid occurring in proteins and essential for many species, particularly the cat.
arginine deaminase test
see arginine dihydrolase test (below).
arginine dihydrolase test
a test for the identification of bacteria, based on the conversion of l-arginine to putrescine. In a positive result, the alkaline product is indicated by bromocresol purple. Called also arginine deaminase test.
an androgen-dependent enzyme derived from the prostate which occurs in high concentrations in seminal plasma.
arginine nutritional deficiency
results in elevated blood ammonia concentration. Cats are particularly sensitive and within hours of eating an arginine-free diet, severe neurological signs develop, leading to death. In other species, cataracts have been reported in dogs and feather abnormalities occur in chickens on deficient diets.
a potent vasoconstrictor in mammals.
the normal antidiuretic hormone in birds; released from the avian posterior pituitary.