O-LevelBiologyTransport in Humans5090/11 · Oct/Nov 2016 · Q151 Mark
Two people carried out a short period of exercise on a treadmill. Each of the two people ran on the treadmill for the same amount of time and at the same speed. The graph shows the pulse rates of these two people before, during and after the period of exercise. [Figure 15.1] Which interpretation of the graph is correct?
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APerson X is fitter, and their heart rate increases more during exercise.
BPerson X is fitter, and their heart rate recovers more quickly after exercise.
CPerson Y is fitter, and their heart rate increases more during exercise.
DPerson Y is fitter, and their heart rate recovers more quickly after exercise.
✓ Correct answer
D: Person Y is fitter, and their heart rate recovers more quickly after exercise.
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