What is arginine vasopressin (AVP) hormone and how does it work?

Updated: Aug 16, 2019
  • Author: Christie P Thomas, MBBS, FRCP, FASN, FAHA; Chief Editor: Vecihi Batuman, MD, FASN  more...
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The antidiuretic hormone in humans and most mammals is arginine vasopressin (AVP). AVP promotes the reabsorption of water from the tubular fluid in the collecting duct, the hydro-osmotic effect, and it does not exert a significant effect on the rate of Na+ reabsorption. A second action of AVP is to cause arteriolar vasoconstriction and a rise in arterial blood pressure, the pressor effect. [3]

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