Chapter 13a

Antidiuretic hormone (ADH) also known as vasopressin, a hormone that controls the insertion of aquaporins into the collecting ducts, regulating the reabsorption of water	Aquaporins channels inserted into the collecting ducts in response to antidiuretic hormone, allow for reabsorption of free water	Arrhythmias abnormal heartbeats	Arteries blood vessels that carry blood away from the heart
Arterioles nearly microscopic blood vessels delivering blood to the capillary bed	Atrium a small, upper chamber of the heart	Bladder organ that stores urine before excretion	Capillaries the smallest blood vessels where cellular exchange occurs