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2.3 The nervous system and brain

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Question 6
F

Two neurones have the same length. One has an intact myelin sheath and the other has lost much of its myelin.

Which statement explains the difference in impulse transmission?

[1]
A

the intact sheath releases neurotransmitter and decreases transmission speed

B

the intact sheath insulates the neurone and decreases transmission speed

C

the intact sheath insulates the neurone and increases transmission speed

D

the intact sheath releases neurotransmitter and increases transmission speed

Markscheme

2.3 The nervous system and brain Questions

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

43 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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