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.
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.
You might be surprised that many of the most popular breeds of cats originated in the United States. Here's a roundup of 10 cat breeds with American roots. Maine coon. The official state cat of Maine, this gentle giant is one of the largest cat breeds, weighing up to 18 pounds. In fact, it's so big that some folks once believed it was a cross between a cat and a raccoon, hence the breed's name.