plumiMuscle fibres: fast and slow twitch: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 7.2.2 Muscle fibres: fast and slow twitch, 2019–2025, with mark schemes and examiner’s reports where available.
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Q5(a)(i)
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All 15 questions on Muscle fibres: fast and slow twitch, as a list
- October 2024, Unit 5, Q5(a)(i) (1 mark): Which of the following features of pronghorns is an adaptation for running long distances at high speeds? (1) A decreased glomerular filtration rate B increased
- January 2024, Unit 5, Q6(a)(i) (1 mark): Name the main type of muscle fibre that is being used in the leg muscles of a sprinter. (1)
- January 2024, Unit 5, Q6(a)(iii) (1 mark): Which of the following statements are features of muscle fibres in a long‑distance runner? (1) 1. have reduced blood capillary network 2. have larger number of
- June 2023, Unit 5, Q4(b)(iii) (4 marks): Describe how the structure of a fast twitch muscle fibre differs from a slow twitch muscle fibre. (4)
- January 2023, Unit 5, Q6(a) (3 marks): The table compares the percentage of slow twitch fibres in different types of athlete. Range of percentages of slow twitch Type of athlete fibres in muscle (%)
- October 2022, Unit 5, Q4(b)(ii) (2 marks): Suggest why a cheetah can maintain this heart rate and speed for only a short period of time. (2)
- June 2022, Unit 5, Q7(c)(i) (3 marks): Explain the difference in the number of mitochondria in these two types of muscle fibre. (3)
- January 2022, Unit 5, Q2(b)(i) (1 mark): What is the role of myoglobin in muscle fibres? (1) A it is an enzyme that reacts with myosin B it is part of the sarcolemma involved in the release of calcium
- January 2022, Unit 5, Q2(b)(ii) (3 marks): Explain why the muscles of a sprinter have a high percentage of fast twitch fibres. (3)
- October 2021, Unit 5, Q1(b) (4 marks): The table shows some features of slow and fast twitch muscle fibres. Feature of fibre Slow twitch fibre Fast twitch fibre Number of mitochondria Many Few per fi
- June 2021, Unit 5, Q8(a) (3 marks): Describe the structure of a skeletal muscle fibre (paragraph 2). (3)
- June 2021, Unit 5, Q8(c) (4 marks): Explain why the changes that occur to muscle structure and composition in the elderly can affect their ability to rise from a chair (paragraph 4). (4)
- January 2021, Unit 5, Q2(a) (3 marks): The muscle strength of the athlete before moderate training was 12.5 a.u. Calculate the muscle strength of the athlete after 12 weeks of moderate training. Give
- January 2021, Unit 5, Q2(b)(i) (3 marks): Describe how the structure of an intermediate fibre will differ from the structure of a slow twitch fibre. (3)
- January 2021, Unit 5, Q2(b)(ii) (3 marks): Comment on the effect of exercise on this muscle. Use the information in the graphs and the table to support your answer. (3)
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