Vasopressin is a peptide hormone. It constitutes educed from a preprohormone precursor that is synthesized in the hypothalamus and stored in vesicles at the posterior pituitary. Most of it is stored in the posterior pituitary to be released into the blood stream; however, some of it is also released directly into the learning ability.
Arginine vasopressin (AVP), also known as vasopressin, argipressin or antidiuretic hormone (ADH), is a hormone found in most mammals, including humans. Arginine vasopressin is released from the posterior pituitary in response to increased serum osmolality or reduced plasma loudness.1,2 Under rule considerations, the major physiological office from antidiuretic hormone constitutes the regulation of water balance. It causes not appear to play a leading purpose incoming the vascular regulation of line insistence and abnormally high endogenous vasopressin levels (syndrome of inappropriate ADH secretion) do not produce hypertension.
This offers that raised vascular responsiveness to endogenous vasopressin may impart to the increase fashionable SVR brought about by heart failure. The pressor actions of vasopressin are complex and incompletely understood. Vasopressin acts via specific renal (V-2) and vascular (V-1) receptors although vascular Pitressin receptors are not equally easily characterised as are adrenergic receptors.
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