A 38-year-old person had a resting heart rate of 72 bpm . The person exercised for 10 minutes. At the end of exercise their heart rate was 170 bpm . Calculate the percentage change in heart rate from the beginning to the end of exercise for the 38 -year-old. Give your answer to the nearest whole number. Space for working. ......................................................... \%

Biology

IGCSE&ALevel

CAIE

Exam No：0610_s24_qp_32. Year：2024 Question No：4(c)

Answer:

9.1.1 Describe the circulatory system as a system of blood vessels with a pump and valves to ensure one-way flow of blood

9.1.2 Describe the single circulation of a fish

9.1.3 Describe the double circulation of a mammal

9.1.4 Explain the advantages of a double circulation

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