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Measurement of a child's cardiac cycle showed that systole lasted for 0.2 seconds while diastole lasted for 0.4 seconds - Scottish Highers Human Biology - Question 16 - 2023

Question 16

Measurement-of-a-child's-cardiac-cycle-showed-that-systole-lasted-for-0.2-seconds-while-diastole-lasted-for-0.4-seconds-Scottish Highers Human Biology-Question 16-2023.png

Measurement of a child's cardiac cycle showed that systole lasted for 0.2 seconds while diastole lasted for 0.4 seconds. What was the heart rate of this child? A 60... show full transcript

Worked Solution & Example Answer:Measurement of a child's cardiac cycle showed that systole lasted for 0.2 seconds while diastole lasted for 0.4 seconds - Scottish Highers Human Biology - Question 16 - 2023

Step 1

Calculate the duration of one cardiac cycle

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Answer

The total duration of a cardiac cycle is the sum of the durations of systole and diastole:

ext{Total duration} = ext{Systole} + ext{Diastole} = 0.2 ext{ seconds} + 0.4 ext{ seconds} = 0.6 ext{ seconds}

Step 2

Calculate the heart rate

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Answer

Heart rate can be calculated using the formula:

ext{Heart Rate} = rac{60 ext{ seconds}}{ ext{Total duration (in seconds)}}

Substituting the total duration:

ext{Heart Rate} = rac{60}{0.6} = 100 ext{ beats per minute}

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