GCSE Combined Science (AQA)

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Anaerobic Respiration

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Bioenergetics Respiration

Anaerobic Respiration

2:51 Types of Respiration
Spec 4.4.2.1
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  • Anaerobic respiration occurs without oxygen.
  • The term "anaerobic" means "without oxygen."
  • This type of respiration is common in animal muscles during intense exercise and results in the production of lactic acid.
  • Lactic acid buildup in muscles can cause pain and cramps.
  • Anaerobic respiration leads to incomplete oxidation of glucose, resulting in less energy transfer compared to aerobic respiration.
  • In plant and yeast cells, anaerobic respiration produces ethanol and carbon dioxide, a process known as fermentation.
  • Fermentation is crucial in the production of bread and alcoholic beverages, highlighting its economic importance.
  • Carbon dioxide from fermentation helps bread rise, while ethanol is used in alcoholic drinks.
  • The economic impact of fermentation is significant, with substantial spending on bread and alcohol globally.
  • Despite potential negative effects on the body when oxygen is low, anaerobic respiration has beneficial applications.

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