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 so many different cat breeds to choose from! Maine Coons are not the only big cats around. It's quite a spectacle to see such a big cat enter the room! The following six cat breeds are our picks for the large cat breeds. There are a few personality traits that these breeds hold in common. They are known for being loyal, playful, dog-like in nature, and very loving family members. Some of them are very popular cat breeds, too!