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Cambridge IGCSE Combined Science practice

Paper 4 structured question: Heart

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Heart

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Paper 4Theory (Extended)3 marks

The effects of exercise on heart rate are important for understanding cardiovascular health.

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Effects of Exercise on Heart Rate

A study measured the heart rates of individuals before and after a 20-minute cycling session. The average resting heart rate was 68 bpm, and the average heart rate after exercise was 140 bpm.

  1. a

    Discuss the significance of the changes in heart rate observed in the study.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 4 structured question: Heart

Paper 4Theory (Extended)2 marks

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Heart Rate Response to Exercise

During a 30-minute jogging session, a person's heart rate was monitored. The heart rate increased from 70 bpm at rest to 150 bpm during the exercise.

  1. a

    Analyse the changes in heart rate during the jogging session.

    Aim for approximately 2 distinct marking points.

    [2]