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3.16 Heart rate, exercise and adrenaline
Exam question
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Explain why heart rate increases during exercise.
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Total for this question: 3 marks
3.16 Heart rate, exercise and adrenaline
Exam question
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Which hormone increases heart rate in a frightening situation?
(1)Total for this question: 1 mark
3.16 Heart rate, exercise and adrenaline
Exam question
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Explain how adrenaline helps a person to run away from danger.
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Total for this question: 2 marks
3.16 Heart rate, exercise and adrenaline
Exam question
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Illustrative data. The student exercised from 0 to 6 minutes, then rested.
| Time / min | Heart rate / beats per minute |
|---|---|
| 0 | 70 |
| 2 | 110 |
| 4 | 135 |
| 6 | 140 |
| 8 | 100 |
| 10 | 78 |
Plot a graph of heart rate against time. Join your points with straight lines using a ruler.
(5)Graph skills: SLAPUK and choosing a scale
Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 5 marks
3.16 Heart rate, exercise and adrenaline
Exam question
Mark points shown after marking
| Time / min | Heart rate / beats per minute |
|---|---|
| 0 | 70 |
| 2 | 110 |
| 4 | 135 |
| 6 | 140 |
| 8 | 100 |
| 10 | 78 |
Describe how the heart rate changed during and after exercise.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
3.16 Heart rate, exercise and adrenaline
Exam question
Mark points shown after marking
| Time / min | Heart rate / beats per minute |
|---|---|
| 0 | 70 |
| 2 | 110 |
| 4 | 135 |
| 6 | 140 |
| 8 | 100 |
| 10 | 78 |
Calculate the percentage increase in heart rate from rest to 6 minutes.
(2)Total for this question: 2 marks
3.16 Heart rate, exercise and adrenaline
Exam question
Mark points shown after marking
| Time / min | Heart rate / beats per minute |
|---|---|
| 0 | 70 |
| 2 | 110 |
| 4 | 135 |
| 6 | 140 |
| 8 | 100 |
| 10 | 78 |
Explain why heart rate stays high for several minutes after exercise.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
3.16 Heart rate, exercise and adrenaline
Exam question
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Suggest why a fit athlete has a lower resting heart rate than an unfit person.
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Total for this question: 2 marks
3.16 Heart rate, exercise and adrenaline
Exam question
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Cardiac output = heart rate × stroke volume. A person has a heart rate of 72 beats per minute and a stroke volume of 70 cm³. Calculate the cardiac output in dm³ per minute.
(2)Total for this question: 2 marks
3.16 Heart rate, exercise and adrenaline
Exam question
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During exercise the cardiac output was 20 000 cm³ per minute and the heart rate was 160 beats per minute. Calculate the stroke volume.
(2)Total for this question: 2 marks
3.16 Heart rate, exercise and adrenaline
Exam question
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Explain how the brain detects that heart rate needs to increase during exercise.
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Total for this question: 2 marks
3.16 Heart rate, exercise and adrenaline
Exam question
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Which is the best way to measure heart rate in a school investigation?
(1)Total for this question: 1 mark
3.16 Heart rate, exercise and adrenaline
Exam question
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Explain why it is better to count the pulse for 60 seconds than for 10 seconds and multiply by 6.
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Total for this question: 2 marks
Plan it with CORMMSS: Design an investigation (Logic Lab).
3.16 Heart rate, exercise and adrenaline
Exam question
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Link: practise planning on /subjects/igcse-biology/logic-lab/design-an-investigation.
Design an investigation to find out how the duration of exercise affects heart rate.
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Total for this question: 6 marks
3.16 Heart rate, exercise and adrenaline
Exam question
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Explain why adrenaline also increases the breathing rate.
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Total for this question: 2 marks
