Conivaptan and Tolvaptan are recently approved receptor antagonists of this compound, a derivative of
 which is used to treat uremic platelet dysfuction. Small-cell lung carcinoma often secretes this hormone
 inappropriately, which leads to euvolemic hyponatremia. In pigs, this hormone contains a lysine at the 8th
 position rather than an arginine, and it is under-secreted in central diabetes insi
Conivaptan and Tolvaptan are recently approved receptor antagonists of this compound, a derivative of
 which is used to treat uremic platelet dysfuction. Small-cell lung carcinoma often secretes this hormone
 inappropriately, which leads to euvolemic hyponatremia. In pigs, this hormone contains a lysine at the 8th
 position rather than an arginine, and it is under-secreted in central diabetes insipidus. This hormone works
 by inserting additional aquaporins into the membrane of the distal convoluted tubule and collecting duct.
 This hormone, which like oxytocin is secreted by the posterior pituitary gland, is responsible for staving off
 dehydration. For 10 points, name this hormone which is responsible for signaling the kidneys to retain
 water.
Conivaptan and Tolvaptan are recently approved receptor antagonists of this compound, a derivative of
 which is used to treat uremic platelet dysfuction.
{anti}-{diuretic} hormone [or {ADH}; or {Vasopressin}]