Which statement describes the oxygen debt built up during vigorous exercise?
The volume of oxygen needed to react with all the glucose stored in the muscles
The volume of oxygen needed to convert lactic acid into carbon dioxide and water
The volume of oxygen needed to remove the carbon dioxide produced in the muscles
The volume of oxygen needed to break down the glycogen stored in the liver cells
51 exam-style questions on AQA GCSE Biology 4.2 Respiration, covering 4.2.1 Aerobic and anaerobic respiration, 4.2.2 Response to exercise, and 4.2.3 Metabolism. Each one has a worked solution and a mark scheme showing where the marks go.