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GCSE Combined Science · key term
The substance produced by anaerobic respiration in muscle cells.
Used by AQA
Specification 4.4.2.1, 4.4.2.2 · Paper 1
A substance formed by the incomplete oxidation of glucose during anaerobic respiration in muscles.
Specify the cells involved: anaerobic respiration produces lactic acid in muscles, but ethanol and carbon dioxide in plants and yeast.
For Higher Tier, define oxygen debt as the extra oxygen needed after exercise, and name the liver as the organ where lactic acid is converted back into glucose.
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