When the electron transporters in the respiratory
chain are oxidized and reduced, small amounts of energy is given off. This energy6 is then used to energize the proton pumps
that pump the H+ ions across the internal membrane into the intermediate space. These ions are inclosed between two membranes,
so a concentration gradient is created. When the H+ ions move through ATP synthase, it helps the synthesis of ATP.
Almost all the ATP production is made
in the Electron Transport Chain. This phase gives enough energy for mammals or other organisms to maintain body temperature
and keep up with other demands of energy. In total the Electron Transport Chain makes 36(38) ATP.