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.
This breed was established in 1907. Colors range from a dark blue-gray to a very light, almost lavender tone. Kittens often have a ring on their tails which fades with maturity. Their eyes take on various shades of green, anywhere from a light apple green to deep emerald or jade hues. Calm, quiet, clean and affectionate, the Russian Blue is an ideal pet even for the apartment dweller. Contact the cat breeders below for your next family friend. Read more on this breed.