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2.3 The nervous system and brain

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Question 38
F

What happens when an electrical impulse reaches the end of a neurone at a synapse?

[1]
A

a chemical is released and travels along the axon

B

a chemical is released and diffuses across the gap

C

an electrical impulse passes directly across the gap

D

an electrical impulse passes through the myelin sheath

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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