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.
LONG-HAIRED CAT BREEDS. Long-haired cat breeds include some of the most popular and populous of all domestic cat breeds. Many of these breeds are ancient like the glorious Turkish Angora, and some are relatively new and very exciting like the awesome Ragdoll and the lovely, expressive American curl (not always long-haired).