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The graph shows the heart rate of a fit person and of an unfit person at rest, during exercise and after exercise - Edexcel - GCSE Biology - Question 3 - 2014 - Paper 1
Question 3
The graph shows the heart rate of a fit person and of an unfit person at rest, during exercise and after exercise. Heart rate / beats per minutes 140 120 100 80... show full transcript
Worked Solution & Example Answer:The graph shows the heart rate of a fit person and of an unfit person at rest, during exercise and after exercise - Edexcel - GCSE Biology - Question 3 - 2014 - Paper 1
Step 1
For the unfit person:
Answer
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The unfit person’s heart rate is higher or reacts faster compared to the fit person. Both individuals peak at the same time, but the unfit person reaches a higher rate.
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The heart rate of the unfit person increases more quickly (to maximum) than that of the fit person.
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When the exercise ceases, the heart rate of the unfit person decreases more slowly (back to resting rate) compared to the fit person.
Step 2
Step 3
For the fit person:
Answer
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The fit person recovers faster, indicating a shorter recovery period compared to the unfit person.
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The fit person has a greater vital capacity and higher stroke volume, leading to improved blood flow and oxygen output.
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They experience less or no anaerobic respiration, resulting in reduced lactic acid build-up, and they recover more efficiently post-exercise.