In cellular respiration there is a process in the inner membrane known as Chemiosmosis. This mechanism occurs in glycolysis and the Krebs cycle. This process is also known as the Electron Transport Chain. It is an energy converter that transforms chemical energy into a gradient of H+. The Electron transport chain is found in the membrane of the mitochondria and it donates electrons, hydrogen ions are dropped and picked up and dropped in the intermembrane space. The ETC functions s a proton pump that pumps out H+ across the membrane. The flow of H+ is finished when the ions pass down their gradient through an ATP synthase, which uses the energy to make ATP, this process is known as oxidative phosphorylation. In a general view chemiosmosis is an energy coupling mechanism that uses exergonic reactions to store energy in the form of H+ gradient and then use this to drive other kinds of work such as ATP synthesis.

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