The ability of water to maintain a relatively constant temperature and thus prevent sudden changes is because of its high (1) heat capacity. Biochemical reactions in the body must occur in (2) aqueous environments. About (3) 70% of the volume of a living cell is water. Water molecules are bonded to other water molecules because of the presence of (4) hydrogen bonds. Water, as H+ and OH- ions, is essential in biochemical reactions such as (5) acid-base and (6) oxidation-reduction reactions. Because of its (7) polarity, water is an excellent solvent and forms the basis of mucus and other body (8) fluids.
