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.
There are many cat breeds in all, and they are all adorable, but these 20 seem to strike many as the most irresistible, and we can see why. They are as adorable as ever, and we think you will love these breeds and their cute kittens. Ragdoll. These are our favorite kittens, by far.