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 secreted in the post pituitary gland, which is stimulated by a decrease in plasma volume, blood pressure and increase in plasma osmolarity. ADH increases aquaporin channels, which. increase water reabsorption. The purpose of this experiment was to compare the urine flow rate and specific gravity of. adults during fasting and following consumption of water, coke and Gatorade. The composition. of these liquids, allows us to study how the kidneys maintain fluid balance in the body, with the.