The brain and the nervous system

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Question 25
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Figure 1 shows a simplified diagram of a reflex arc, focusing on the pathway inside the spinal cord.

Diagram showing a cross-section of the spinal cord in a reflex arc. A sensory neurone enters the spinal cord and connects to a relay neurone. The connection point between the sensory neurone and the relay neurone is highlighted with a circle and labelled 'Synapse'. The relay neurone then connects to a motor neurone inside the spinal cord's grey matter.

Describe how a nerve impulse is transmitted across the synapse from the sensory neurone to the relay neurone.

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The brain and the nervous system Questions

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