3.38 Impulses and rapid responses
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In which form does information travel along a neurone?
(1)Total for this question: 1 mark
3(j) CO-ORDINATION AND RESPONSE · EXAM QUESTIONS
3.38 Impulses and rapid responses
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3.38 Impulses and rapid responses
Exam question
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Describe the pathway of a nerve impulse from a receptor to an effector.
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Total for this question: 3 marks
3.38 Impulses and rapid responses
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Explain how the myelin sheath helps nerve impulses travel quickly.
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Total for this question: 2 marks
3.38 Impulses and rapid responses
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Explain why motor neurones that run from the spinal cord to the foot are very long.
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Total for this question: 2 marks
3.38 Impulses and rapid responses
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Illustrative class data.
Reaction times measured with a ruler drop test Attempt Distance ruler fell / cm Reaction time / s 1 18 0.19 2 15 0.17 3 12 0.16 4 11 0.15 5 11 0.15 Illustrative data, not from a real investigation. Calculate the mean reaction time.
(2)sTotal for this question: 2 marks
3.38 Impulses and rapid responses
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Reaction times measured with a ruler drop test Attempt Distance ruler fell / cm Reaction time / s 1 18 0.19 2 15 0.17 3 12 0.16 4 11 0.15 5 11 0.15 Illustrative data, not from a real investigation. Suggest why the reaction time decreased over the five attempts.
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Total for this question: 2 marks
Plan it with CORMMSS: Design an investigation (Logic Lab).
3.38 Impulses and rapid responses
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Link: practise planning on /subjects/igcse-biology/logic-lab/design-an-investigation.
Design an investigation to find out whether drinking caffeine affects reaction time.
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Total for this question: 6 marks
3.38 Impulses and rapid responses
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Explain why using an online reaction-time test gives more accurate results than a ruler drop.
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Total for this question: 2 marks
3.38 Impulses and rapid responses
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Which neurone carries impulses from the CNS to a muscle?
(1)Total for this question: 1 mark
3.38 Impulses and rapid responses
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State one advantage of a rapid response to a stimulus.
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Total for this question: 1 mark
3.38 Impulses and rapid responses
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Explain why alcohol increases reaction time.
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Total for this question: 2 marks