Describe and explain how the secretion of ADH affects urine produced by the kidneys.

ADH diffuses into the bloodstream and acts in the kidney to regulate the volume and concentration of the urine . The ADH binds onto the receptors on the collecting duct controlling the permeability of the collecting duct. If there is more ADH the permeability increases and which means more water is reabsorbed via osmosis. This will result in a higher concentration of urine as the volume of urine produced decreases.