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.
Regardless of the traits you desire in a cat, here are some of the most popular cat breeds: Abyssinian, American Shorthair, Birman, Maine Coon, Oriental, Persian, Ragdoll, Siamese, and Sphynx. Find Breeds That Fit Your Lifestyle. Abyssinian. American Shorthair.