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This lesson covers anaerobic respiration — respiration without oxygen — as required by the Edexcel GCSE Combined Science specification (1SC0). You need to know the word equations for anaerobic respiration in animals and in yeast/plants, understand the concept of oxygen debt and compare aerobic with anaerobic respiration.
Anaerobic means "without oxygen." Anaerobic respiration is the release of energy from glucose without using oxygen. It occurs when cells cannot get enough oxygen to meet their energy demands — for example, during vigorous exercise.
Anaerobic respiration releases much less energy per molecule of glucose than aerobic respiration because glucose is only partially broken down.
In animal cells (including humans), the word equation is:
glucose→lactic acid+energy
Key points:
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