____ respiration is respiration requiring oxygen. In aerobic respiration the reactants are ____ and oxygen. The products are water and ____ ____. ____ is also released. ____ respiration is respiration without oxygen. Anaerobic respiration takes place when there is ____ ____ oxygen available but energy is required. This happens when an athlete runs very fast but the body cannot supply enough ____. In anaerobic respiration the reactant is only glucose. The product is ____ acid. A ____ energy is released. This is because not all the energy is released from each glucose molecule. To get rid of lactic acid the person will ____ heavily in order to get a good supply of oxygen. You have to keep breathing hard for a while after you stop to get oxygen into your muscles to convert the painful lactic acid which has built up to harmless carbon dioxide and ____. The amount of oxygen required to do this is called oxygen ____.

Aerboic & anaerobic respiration

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