During vigorous exercise, anaerobic respiration occurs in a person’s body - AQA - GCSE Biology - Question 4 - 2023 - Paper 1
Question 4
During vigorous exercise, anaerobic respiration occurs in a person’s body.
Explain two effects of anaerobic respiration on the person’s body.
Worked Solution & Example Answer:During vigorous exercise, anaerobic respiration occurs in a person’s body - AQA - GCSE Biology - Question 4 - 2023 - Paper 1
Step 1
1. Explain one effect: muscle fatigue or cramp
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Answer
One effect of anaerobic respiration is muscle fatigue or cramping. This happens because anaerobic respiration leads to a buildup of lactic acid in the muscles, which can interfere with muscle contractions and cause discomfort or pain.
Step 2
2. Explain another effect: increased heart rate
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Answer
Another effect is an increased heart rate. This occurs as the body attempts to supply more oxygen to the muscles to counteract the buildup of lactic acid, thereby trying to repay the oxygen debt incurred during anaerobic respiration.
