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2.3 The nervous system and brain

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Question 29

In an investigation of the blinking reflex, a drug is applied to the eyelid muscle so that it cannot contract. The drug has no effect on any neurone.

An object approaches the eye. Electrodes record whether impulses pass along the sensory neurone and along the motor neurone.

Which pair of recordings is expected?

[1]
A

an impulse in the sensory neurone; no impulse in the motor neurone

B

an impulse in the sensory neurone; an impulse in the motor neurone

C

no impulse in the sensory neurone; no impulse in the motor neurone

D

no impulse in the sensory neurone; an impulse in the motor neurone

Markscheme

2.3 The nervous system and brain Questions

  1. GCSE
  2. /Biology
  3. /2.3 The nervous system and brain

111 exam-style questions on Edexcel GCSE Biology 2.3 The nervous system and brain, covering 2.3.1 Structures and functions of the brain, 2.3.2 Imaging brain function with scanning, 2.3.3 Limitations in treating nervous system damage, 2.3.4 Neurones and impulse transmission, and 2.3.5 Structure and function of a reflex arc. Each one has a worked solution and a mark scheme showing where the marks go.

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