The brain and the nervous system

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Question 21
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The diagram shows the junction, known as a synapse, between two neurones, Neurone A and Neurone B.

A diagram showing the junction between two neurones. Neurone A is the pre-synaptic neurone and contains vesicles filled with neurotransmitter chemicals. There is a physical gap, labeled synaptic cleft, between Neurone A and Neurone B. Neurone B is the post-synaptic neurone and has specific receptor molecules on its cell surface membrane.

Explain how an electrical impulse is transmitted from Neurone A to Neurone B across the synapse.

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The brain and the nervous system Questions

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