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This quiz contains 10 questions from a mix of 1 subtopics.
What causes synaptic vesicles to fuse with the presynaptic membrane during synaptic transmission?
calcium ions
potassium ions
sodium ions
chloride ions
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Which of the following best describes the role of acetylcholinesterase at cholinergic synapses?
to release acetylcholine into the synapse
to carry action potentials to the synapse
to break down acetylcholine after activation
to synthesise acetylcholine
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How does acetylcholine get transported back into the presynaptic neurone after synaptic transmission?
active transport
simple diffusion
endocytosis
facilitated diffusion
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What causes an action potential to be generated in the postsynaptic neurone?
breakdown of neurotransmitters
closing of ligand-gated ion channels
binding of calcium ions
opening of sodium ion channels
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What is the effect of acetylcholinesterase in the synaptic cleft?
it has no impact on stimulation
it maintains stimulation of the postsynaptic neurone
it stops stimulation of the postsynaptic neurone
it reverses the effects of acetylcholine
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What causes voltage-gated calcium ion channels to open in the presynaptic membrane?
hyperpolarisation
acetylcholine binding
neurotransmitter reuptake
depolarisation
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What happens immediately after the release of acetylcholine into the synapse?
breakdown by acetylcholinesterase
binding to sodium channels
reuptake into the presynaptic neurone
diffusion across the cleft
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Acetylcholine is broken down by the enzyme . The products of this reaction, choline and acetate, are transported back into the presynaptic neurone by transport.
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Explain why removing neurotransmitters from the synaptic cleft is important.
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What are the events that lead to synaptic vesicle fusion in the presynaptic membrane?
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