Experiment: Lactic acid buildup was tested in athletes post-exercise using blood tests.Observation: High levels of lactic acid were found in those performing anaerobic exercises.Question: What does this confirm?
Correct answer: A. Lactic acid is a byproduct of anaerobic respiration, which occurs when oxygen levels are insufficient.
- A. Lactic acid is a byproduct of anaerobic respiration, which occurs when oxygen levels are insufficient.
- B. Aerobic respiration primarily produces carbon dioxide and water, not lactic acid.
- C. Exercise, especially anaerobic, increases lactic acid production due to oxygen deficiency.
- D. Both B and C
Explanation
This confirms that anaerobic exercise causes lactic acid buildup in the body due to anaerobic respiration. When muscles work without enough oxygen, they switch from aerobic respiration to anaerobic respiration, producing lactic acid as a byproduct, which then accumulates in the blood.
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About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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