Muscle fatigue is caused by the accumulation of___________?
Correct answer: B. Lactic acid
- A. Uric acid
- B. Lactic acid
- C. Oxalacetic acid
- D. Fyruvie acid
Explanation
During intense exercise with insufficient oxygen, muscles produce lactic acid through anaerobic respiration, and its associated metabolic changes contribute to fatigue. Uric acid is mainly a waste product of purine breakdown.
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The human body is studied through its organ systems, including digestion, respiration, circulation, excretion, nervous coordination, reproduction and immunity. Coverage also includes nutrients and deficiency diseases, hormones, blood groups, common infections, vaccines, sanitation and basic first aid, while distinguishing communicable diseases from inherited and lifestyle disorders.
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