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During hard running if muscles lack oxygen how can they still get energy?

Answer and explanation

Correct answer: By anaerobic respiration producing lactic acid

During intense running, the oxygen supply may not meet the muscles’ immediate energy demand. Muscle cells then partially break down glucose anaerobically, producing a small amount of ATP and lactic acid rather than completing oxidation to carbon dioxide and water. Lactic acid accumulation is associated with fatigue or cramps. Therefore option A is correct; photosynthesis, bile, and nephrons do not provide this pathway.

Related tags

Anaerobic RespirationLactic AcidMusclesLife ProcessesWorld Of LivingScienceClass 10 Mcq

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