Welcome to the Quiz!
This quiz contains 12 questions from a mix of 1 subtopics.
What causes synaptic vesicles to fuse with the presynaptic membrane during synaptic transmission?
chloride ions
calcium ions
potassium ions
sodium ions
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What is the role of SNARE proteins in synaptic transmission?
to break down neurotransmitters after release
to help synaptic vesicles fuse with the presynaptic membrane
to release neurotransmitters into the synaptic cleft
to transport neurotransmitters into synaptic vesicles
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What causes ligand-gated ion channels on the postsynaptic membrane to open?
binding of acetylcholinesterase
binding of calcium ions
binding of sodium ions
binding of neurotransmitters
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Which of the following best describes the role of acetylcholinesterase at cholinergic synapses?
to carry action potentials to the synapse
to break down acetylcholine after activation
to release acetylcholine into the synapse
to synthesise acetylcholine
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How does acetylcholine get transported back into the presynaptic neurone after synaptic transmission?
facilitated diffusion
simple diffusion
endocytosis
active transport
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What causes an action potential to be generated in the postsynaptic neurone?
closing of ligand-gated ion channels
binding of calcium ions
breakdown of neurotransmitters
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 reverses the effects of acetylcholine
it stops stimulation of the postsynaptic neurone
it maintains stimulation of the postsynaptic neurone
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What causes voltage-gated calcium ion channels to open in the presynaptic membrane?
depolarisation
acetylcholine binding
neurotransmitter reuptake
hyperpolarisation
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What happens immediately after the release of acetylcholine into the synapse?
diffusion across the cleft
reuptake into the presynaptic neurone
binding to sodium channels
breakdown by acetylcholinesterase
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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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