• Oxygen is the final electron acceptor at the end of the electron transport chain of aerobic respiration.
  • In the absence of oxygen, only a few ATP are produced from glucose.
  • With oxygen, organisms can break down glucose all the way to carbon dioxide.
  • This releases enough energy to produce up to 38 ATP molecules.
  • Aerobic respiration releases much more energy than anaerobic resppiration.
  • It lets your muscles get the energy they need for short bursts of intense activity.
  • It may also explain how organisms were able to become multicellular.
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