BI-2227
Aerobic respiration
Biology · Secondary 4 · Medium · Aerobic respiration
During a long sprint, an athlete’s blood pH falls because of lactic acid produced in muscles. After the race, breathing rate remains high. How does this help return blood pH to normal?
- Extra oxygen allows lactic acid to be broken down in the liver by aerobic respiration.
- Extra oxygen neutralises lactic acid directly in the blood without any reaction.
- Extra oxygen causes muscles to stop producing any carbon dioxide.
- Extra oxygen cools the blood so lactic acid becomes harmless.
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