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.
The Siamese is a medium-sized, light-colored cat with stunning sapphire eyes. It is one of the most ancient breeds. There are two types of Siamese: traditional and show. The Show Siamese is very angular, elegant and slender breed. The Traditional Siamese is more round and chunky. Personality: Siamese cats are very active, talkative and curious cats.