What Is Anaerobic Respiration?

Written by eric dontigney
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Cellular respiration happens in two ways. Aerobic respiration is oxygen-based cellular respiration. Anaerobic respiration is cellular respiration that occurs without oxygen. The process of anaerobic respiration begins with breaking down glucose (sugar molecules) that produces pyruvic acid. The pyruvic acid then undergoes a fermentation process to produce ATP, which cells employ for energy production. Human beings are capable of performing both aerobic and anaerobic cellular respiration.

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History

Anaerobic respiration is believed to be the oldest form of cellular respiration. It is still employed by many single celled organisms, particularly in anoxic (lacking oxygen) environments such as some riverbeds.

Alcohol

The anaerobic respiration of some plants and yeasts produces ethanol, which is the basis of consumable alcohol production.

Energy Production

Anaerobic respiration is a less efficient way of cellular energy production, producing only two molecules of ATP to the 40 produced in aerobic respiration, but it is a faster method.

Baking

The anaerobic respiration of yeast and the carbon dioxide causes bread to rise.

Exercise

During intense physical activity, muscles use anaerobic respiration, which produces lactic acid. Lactic acid build-up is the reason muscles become weak during exertion and sore afterwards.

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