Oxygen Debt– It is caused by lactic acid build up during anaerobic respiration. Oxygen is needed to break the lactic acid down into carbon dioxide and water that can then be excreted. The lactic acid is also taken to the liver to be turned into energy or into glycogen and then stored.
Anaerobic Respiration – Occurs in the absence of oxygen and produces a smaller amount of energy. It is the incomplete breakdown of glucose and causes a build up of lactic acid.
Glucose ---> Lactic Acid + Energy
C6H12O6 ---> 2C3H6 + Energy
Drawbacks of Anaerobic Respiration:
o It only produces 1/20 of the amount of energy produced by aerobic respiration.
o It produces lactic acid which is poisonous and can lead to muscle fatigue and even death
Lactic acid is eventually removed from the muscles by blood running through them.
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