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Control of the heartbeat and ECGs: Edexcel International A Level Biology questions

Edexcel International A Level Biology past-paper questions on 7.3.1 Control of the heartbeat and ECGs, 2019–2025, with mark schemes and examiner’s reports where available.

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3,127 questions

  1. The start of question 5

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  2. Q6(b)(ii)

    January 2025 · Unit 5

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  4. Q8(g)

    January 2025 · Unit 5

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  5. Q4(b)(i)

    October 2023 · Unit 5

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  6. Q4(b)(ii)

    October 2023 · Unit 5

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  7. Q8(d)

    June 2022 · Unit 5

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  8. Q7(b)(i)

    January 2022 · Unit 5

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  9. Q7(b)(ii)

    January 2022 · Unit 5

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  10. Q7(b)(iii)

    January 2022 · Unit 5

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  11. Q6(a)(i)

    June 2021 · Unit 5

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  12. Q6(a)(ii)

    June 2021 · Unit 5

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  13. Q6(b)(iii)

    June 2021 · Unit 5

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  14. Q6(b)(iv)

    June 2021 · Unit 5

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All 14 questions on Control of the heartbeat and ECGs, as a list
  1. June 2025, Unit 5, Q5(a)(ii) (4 marks): Describe how the systole and diastole parts of the cardiac cycle are controlled during the exercise. (4)
  2. January 2025, Unit 5, Q6(b)(ii) (1 mark): Heart muscle cells are myogenic. Which describes the term myogenic? (1) A a hormone that initiates differentiation B cardiac muscle that is able to contract wit
  3. January 2025, Unit 5, Q6(b)(iii) (2 marks): Suggest how lidocaine protects heart muscle cells from effects of low oxygen. (2)
  4. January 2025, Unit 5, Q8(g) (3 marks): Describe how energy drinks could be shown to cause irregular heart rhythms. (paragraph 34). (3)
  5. October 2023, Unit 5, Q4(b)(i) (1 mark): Which is the heart rate shown in trace A? (1) A 6 bpm B 48 bpm C 60 bpm D 75 bpm
  6. October 2023, Unit 5, Q4(b)(ii) (2 marks): Describe two differences shown between trace A and trace B. (2)
  7. June 2022, Unit 5, Q8(d) (2 marks): Explain how an electrocardiogram could be used to show that a person has postural orthostatic tachycardia syndrome (POTS) (Box 1). (2)
  8. January 2022, Unit 5, Q7(b)(i) (1 mark): Name the stage of the cardiac cycle at T on this ECG. (1)
  9. January 2022, Unit 5, Q7(b)(ii) (1 mark): The ECG of the patient with AAT is shown in the trace. 1 mV 1.0 s Calculate the mean heart rate shown in this ECG trace. (1) Answer
  10. January 2022, Unit 5, Q7(b)(iii) (3 marks): Compare and contrast the ECG trace of this patient with the normal ECG trace. (3)
  11. June 2021, Unit 5, Q6(a)(i) (1 mark): Which one of the following statements is correct? (1) A Q is the sinoatrial node (SAN) and R is the atrioventricular node (AVN) B Q is the sinoatrial node (SAN)
  12. June 2021, Unit 5, Q6(a)(ii) (1 mark): The electrical impulse that initiates the cardiac cycle begins without the need for a nerve impulse. What is the term for this process? (1) A diastole B myogeni
  13. June 2021, Unit 5, Q6(b)(iii) (1 mark): After training, the footballer had an ECG. This ECG trace is shown in the diagram. 0 1 2 3 4 5 6 7 Time / s Calculate the heart rate of the footballer using the
  14. June 2021, Unit 5, Q6(b)(iv) (3 marks): Two hours later a second ECG was recorded. 0 1 2 3 4 5 6 7 Time / s Comment on the changes that have occurred in the activity of the heart as shown in these two

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