Part of that extra thickness is caused by the protein keratin, which is nourished in deeper layers of the skin but forms a surface layer of dead cells on the epidermis. This extra thickness may also explain why your hands and feet become wrinkled when you soak in the tub.
Antidiuretic hormone (ADH), also called arginine vasopressin (AVP), is a hormone that helps regulate water balance in the body by controlling the amount of water the kidneys reabsorb while they are filtering wastes out of the blood. This test measures the amount of ADH in the blood.
ADH is a hormone produced in the hypothalamus and secreted by the posterior pituitary. ADH is secreted in response to decreasing blood volume. ADH affects the permeability of the nephrons in the kidney to water.ADH makes the nephrons more permeable to water, increasing the amount of water retained by the body. Homeostasis is maintained because more water is returned to the blood, decreasing the loss of water and maintaining the blood volume.DH is secreted in response to decreasing blood volume. ADH affects the permeability of the nephrons in the kidney to water. ADH makes the nephrons more permeable to water, increasing the amount of water retained by the body.