Vasopressin (Antidiuretic Hormone). Vasopressin (arginine vasopressin, AVP; antidiuretic hormone, ADH) is a peptide hormone formed in the hypothalamus, then transported via axons to, and released from, the posterior pituitary into the blood. AVP has two principle sites of action: the kidney and blood vessels.
The Face That Launched 1,000 Awws. Like a tiny feline fashion model, this Persian kitten seems to know how to tilt her head just so. And wow, her eyes are stunning. It's no wonder that the Persian is one of the most popular cat breeds in the United States, according to the Cat Fanciers' Association.
At that show, 170 cats were exhibited, including tabbies, Siamese, and a Birman look-alike, but the Persians and Angoras really stole the show. Since then, the art of cat breeding, and creating new breeds, has become something of a national pastime to fanciers of Felis catus.