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