A scientist measures respiration in a rabbit hind-leg muscle while it contracts at two stimulation rates.
| Stimulation rate | Oxygen use in arbitrary units per minute | Lactic acid production in arbitrary units per minute |
|---|---|---|
| Low | 32 | 0 |
| High | 32 | 9 |
Which conclusion is supported by the results?
lactic acid is produced by aerobic respiration at the higher stimulation rate
the muscle changes completely from aerobic respiration to anaerobic respiration
the unchanged oxygen use shows that the total rate of respiration remains unchanged
anaerobic respiration begins while aerobic respiration remains at the same rate
98 exam-style questions on Edexcel GCSE Biology 8.3 Respiration, covering 8.3.1 Aerobic and anaerobic respiration. Each one has a worked solution and a mark scheme showing where the marks go.