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Cambridge IGCSE Biology practice

Paper 4 structured question: Heart

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Heart

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Paper 4Theory (Extended)2 marks

A person’s heart rate is measured before, during, and after cycling.

Data Table

Heart Rate During Cycling

TimeHeart Rate (bpm)
Before cycling65
During cycling110
5 minutes after cycling75
  1. a

    Identify the trend in heart rate during and after cycling.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 4 structured question: Heart

Paper 4Theory (Extended)3 marks

Description

Heart Rate and Physical Activity

The student records their heart rate at rest and immediately after running. The heart rate increases from 70 beats per minute (bpm) at rest to 120 bpm after running.

ConditionHeart Rate (bpm)
Rest70
After running120
  1. a

    Explain why the heart rate increases during physical activity.

    Aim for approximately 3 distinct marking points.

    [3]