<P> Vasopressin , also named antidiuretic hormone ( ADH ) , arginine vasopressin ( AVP ) or argipressin , is a hormone synthesized as a peptide prohormone in neurons in the hypothalamus , and is converted to AVP . It then travels down the axon of that cell , which terminates in the posterior pituitary , and is released from vesicles into the circulation in response to extracellular fluid hypertonicity ( hyperosmolality ) . AVP has two primary functions . First , it increases the amount of solute - free water reabsorbed back into the circulation from the filtrate in the kidney tubules of the nephrons . Second , AVP constricts arterioles , which increases peripheral vascular resistance and raises arterial blood pressure . </P>
<P> Vasopressin , also named antidiuretic hormone ( ADH ) , arginine vasopressin ( AVP ) or argipressin , is a hormone synthesized as a peptide prohormone in neurons in the hypothalamus , and is converted to AVP . It then travels down the axon of that cell , which terminates in the posterior pituitary , and is released from vesicles into the circulation in response to extracellular fluid hypertonicity ( hyperosmolality ) . AVP has two primary functions . First , it increases the amount of solute - free water reabsorbed back into the circulation from the filtrate in the kidney tubules of the nephrons . Second , AVP constricts arterioles , which increases peripheral vascular resistance and raises arterial blood pressure . </P>
antidiuretic hormone is synthesized by cells in the
antidiuretic hormone is synthesized by cells in the
hypothalamus
hypothalamus