An ice skater completed two high-intensity training drills, A and B, on separate days.
The skater's resting oxygen uptake was 0.40 dm³ per minute. After each drill, the oxygen uptake was measured during four consecutive one-minute periods.
| One-minute period after the drill | Oxygen uptake after drill A in dm³ per minute | Oxygen uptake after drill B in dm³ per minute |
|---|---|---|
| 1 | 1.60 | 2.40 |
| 2 | 1.00 | 1.60 |
| 3 | 0.60 | 0.80 |
| 4 | 0.40 | 0.40 |
Calculate the volume of extra oxygen taken in during the four minutes after drill B, compared with the volume that would have been taken in at rest.
Give your answer in dm³.
Explain why the results suggest that more anaerobic respiration occurred during drill B than during drill A.
92 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.