the water we drink and the water thats expelled after the ETC are different. The water we drink is a catalyst for the Hydrogens as they are pulled back down the concentration gradient. the Hydrogens bond to the Oxygen (which is the reason why we breathe)we need this oxygen to bond with the hydrogen so we can expell it from our body. Otherwise the Hydrogens back up, and stop the pump, and ATP stops being produced,,,, and we die (or that part of the body that is cut off from oxygen dies).
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March 29, 2010 People who scored high on a test that measures impulsive and antisocial traits had exaggerated brain responses to certain “rewards,” like winning money or taking stimulant drugs. The new study provides evidence that a dysfunctional brain reward system may underlie vulnerability to a personality disorder known as psychopathy.
The Evolution of the Human Eye