During a physical education class in Barbados, students ran 400 metres at maximum effort. Which statement correctly describes the type of respiration occurring in their leg muscles during the sprint?

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Question

During a physical education class in Barbados, students ran 400 metres at maximum effort. Which statement correctly describes the type of respiration occurring in their leg muscles during the sprint?

Accepted Answer

Anaerobic respiration occurs when oxygen supply is insufficient — Award 1 mark for understanding that anaerobic respiration occurs when oxygen supply cannot meet demand during vigorous exercise. A is incorrect — aerobic respiration alone cannot meet energy demands during intense activity. B is incorrect — both types of respiration occur. D is incorrect — aerobic respiration produces approximately 38 ATP molecules compared to 2 ATP from anaerobic respiration.

Answer

Only anaerobic respiration occurs throughout the sprint

Answer

Only aerobic respiration occurs throughout the sprint

Answer

Anaerobic respiration occurs when oxygen supply is insufficient

Answer

Anaerobic respiration produces more ATP than aerobic respiration

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