A climber maintains a firm grip while climbing. The table shows data for a forearm muscle.
| Time gripping / seconds | Oxygen needed by the muscle / cm³ min⁻¹ | Oxygen supplied to the muscle / cm³ min⁻¹ |
|---|---|---|
| 30 | 22 | 18 |
| 90 | 28 | 20 |
Using the data, explain which substance is likely to build up more rapidly in the forearm muscle at 90 seconds than at 30 seconds.
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.