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Synapses are junctions between neurones - OCR Gateway - GCSE Biology - Question 15 - 2023 - Paper 3
Question 15
Synapses are junctions between neurones. For an impulse to be generated in another neurone, a neurotransmitter chemical diffuses across the gap and binds to receptor... show full transcript
Worked Solution & Example Answer:Synapses are junctions between neurones - OCR Gateway - GCSE Biology - Question 15 - 2023 - Paper 3
Step 1
Which direction can an impulse pass across a synapse?
Answer
The correct answer is A) Only from the neurone that contains the vesicles to the neurone that contains the receptor sites. This is because neurotransmitter release occurs from vesicles in the presynaptic neurone into the synaptic cleft, where they bind to receptors on the postsynaptic neurone to generate an impulse.