Question detail
For Respiration, which option explains "define (HT only) oxygen debt as the extra oxygen needed after exercise to react with accumulated lactic acid and remove it from cells" most accurately?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Respiration
Question
- A. Define (HT only) oxygen debt as the extra oxygen needed after exercise to react with accumulated lactic acid and...
- B. An unrelated statement about Respiration
- C. A conclusion that ignores the evidence in the question
- D. A broader claim that goes beyond this specification point
Answer
Define (HT only) oxygen debt as the extra oxygen needed after exercise to react with accumulated lactic acid and... is correct for this objective.
Explanation
Define (HT only) oxygen debt as the extra oxygen needed after exercise to react with accumulated lactic acid and... is the supported choice because it connects directly to "Define (HT only) oxygen debt as the extra oxygen needed after exercise to react with accumulated lactic acid and remove it from cells" and keeps the explanation inside the AQA GCSE Biology Respiration curriculum. The other options are weaker because they are either unrelated, unsupported by the objective, or too broad for this page.
Common mistake
Misunderstanding Oxygen Debt
Students often confuse oxygen debt with the amount of oxygen consumed during exercise, rather than understanding it as the extra oxygen required post-exercise to clear lactic acid.
Clarify that oxygen debt specifically refers to the additional oxygen needed after exercise to metabolize lactic acid that has built up in the muscles.
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