To retain water in the body and to constrict blood vessels.
Report Abuse. Its gotta be A because ADH helps the kidney conserve the water but not salt. It is secreted by the posterior pituitary, not the kidney. ADH conserves body water by decreasing urine production. ADH causes the kidneys to return more water to the blood and this has the effect of decreasing urine volum Vasopressin is a peptide hormone that increases water permeability of the kidney's collecting duct and distal convoluted tubule by inducing translocation of aquaporin-CD water channels in the plasma membrane of collecting duct cells. Vasopressin is secreted from the posterior pituitary gland in response to reductions in plasma volume, in response to increases in the plasma osmolality, and in response to cholecystokinin (CCK) secreted by the small intestine : Antidiuretic hormone (ADH), also called arginine vasopressin (AVP), is a hormone that helps regulate water balance in the body by controlling the amount of water the kidneys reabsorb while they are filtering wastes out of the blood. This test measures the amount of ADH in the blood. ADH is normally released by the pituitary in response to sensors that detect an increase in blood osmolality (number of dissolved particles in the blood) or decrease in blood volume. The kidneys respond to ADH by conserving water and producing urine that is more concentrated. Vasopressin regulates the body's retention of water by acting to increase water reabsorption in the kidney's collecting ducts, the tubules which receive the very dilute urine produced by the functional unit of the kidney, the nephrons. Vasopressin is secreted from the posterior pituitary gland in response to reductions in plasma volume, in response to increases in the plasma osmolality, and in response to cholecystokinin (CCK) secreted by the small intestine : ADH is produced by the hypothalamus in the brain and stored in the posterior pituitary gland at the base of the brain. ADH is normally released by the pituitary in response to sensors that detect an increase in blood osmolality (number of dissolved particles in the blood) or decrease in blood volume. The kidneys respond to ADH by conserving water and producing urine that is more concentrated. ADH is also called arginine vasopressin. It is a water-regulating hormone made by the hypothalamus (in the brain), and stored in the posterior pituitary gland. ADH is the chemical that tells the kidneys how much water to conserve. ADH constantly regulates and balances the amount of water in the blood. Higher water concentration increases the volume and pressure of the blood. Osmotic sensors and baroreceptors work in tandem with ADH to maintain water metabolism. ADH is a hormone that helps your kidneys manage the amount of water in your body. The test is seldom used alone, but is often combined with other tests to find out what is causing too much or too little of this hormone to be present vasopressin, antidiuretic hormone, ADH, Pitressin (noun). hormone secreted by the posterior pituitary gland (trade name Pitressin) and also by nerve endings in the hypothalamus; affects blood pressure by stimulating capillary muscles and reduces urine flow by affecting reabsorption of water by kidney tubules. Vasopressin, also known as arginine vasopressin (AVP), antidiuretic hormone (ADH), or argipressin, is a neurohypophysial hormone found in most mammals. Its two primary functions are to retain water in the body and to constrict blood vessels. Vasopressin is secreted from the posterior pituitary gland in response to reductions in plasma volume, in response to increases in the plasma osmolality, and in response to cholecystokinin (CCK) secreted by the small intestine : Antidiuretic hormone (ADH): A relatively small (peptide) molecule that is released by the pituitary gland at the base of the brain after being made nearby (in the hypothalamus). ADH has an antidiuretic action that prevents the production of dilute urine (and so is antidiuretic). 
https://answers.yahoo.com/question/index?qid=20100220165420AA6uxmf https://en.wikipedia.org/wiki/Vasopressin https://labtestsonline.org/understanding/analytes/adh/tab/sample https://en.wikipedia.org/wiki/Vasopressin https://labtestsonline.org/understanding/analytes/adh/tab/sample http://www.healthline.com/health/adh http://www.abbreviations.com/ADH https://en.wikipedia.org/wiki/Vasopressin http://www.medicinenet.com/script/main/art.asp?articlekey=7000
what does ADH do