BI-2251
Oxygen debt
Biology · Secondary 4 · Medium · Oxygen debt
A person walks quickly up a steep hill and then stops to rest. During the climb, some of the person’s muscles respire anaerobically. Which statement explains why the person continues to breathe heavily for several minutes after stopping?
- Extra oxygen is needed to break down lactic acid formed in the muscles
- Extra oxygen is needed to produce more lactic acid for energy
- Extra oxygen is needed to stop aerobic respiration completely
- Extra oxygen is needed to cool the blood to its original temperature
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