Transmission Across a Synapse (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the synaptic cleft?
What is the synaptic cleft?
The gap between two neurones
What triggers calcium ion protein channels to open in the presynaptic neurone?
What triggers calcium ion protein channels to open in the presynaptic neurone?
Arrival of an action potential
How do ions enter the synaptic knob?
How do ions enter the synaptic knob?
Facilitated diffusion
What causes synaptic vesicles to fuse with the presynaptic membrane?
What causes synaptic vesicles to fuse with the presynaptic membrane?
Influx of calcium ions
Why does acetylcholine diffuse rapidly across the synaptic cleft?
Why does acetylcholine diffuse rapidly across the synaptic cleft?
Short diffusion pathway
What happens when acetylcholine binds to receptor sites on the postsynaptic membrane?
What happens when acetylcholine binds to receptor sites on the postsynaptic membrane?
Sodium ion protein channels open
What is the role of acetylcholinesterase?
What is the role of acetylcholinesterase?
Hydrolyses acetylcholine
What are the breakdown products of acetylcholine?
What are the breakdown products of acetylcholine?
Choline and ethanoic acid
What provides the energy to recombine choline and ethanoic acid back into acetylcholine?
What provides the energy to recombine choline and ethanoic acid back into acetylcholine?
ATP from mitochondria
What type of signal conversion occurs during synaptic transmission?
What type of signal conversion occurs during synaptic transmission?
Electrical to chemical to electrical