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.
As a matter of fact, we like to think of ourselves as connoisseurs of cute â especially if we're talking baby animals. So to bring you the most adorable photos we have (an incredibly difficult and taxing task), we scoured our cat breed profiles for photos that made us say aww.. From the precious Persian to the fluffy Maine Coon, these 11 kitten photos are so cute that they're sure to put a smile on your face.