Two volunteers complete the same hard rowing task. After stopping, Eleni continues to breathe faster and deeper than at rest for 7 minutes. Priya does so for 3 minutes.
What does this difference indicate?
Eleni has the larger oxygen debt, so she has more lactic acid to remove.
Priya has the larger oxygen debt, as she took in her extra oxygen in less time.
Priya has the larger oxygen debt, as she breathes out her lactic acid faster.
Eleni has the larger oxygen debt, as her muscles keep making lactic acid at rest.
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.