Welcome to the Quiz!
This quiz contains 14 questions from a mix of 1 subtopics.
What is the term for the gap between the presynaptic and postsynaptic membranes?
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Synapses allow transmission of nerve impulses in only one direction - from neurones to neurones.
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Where are neurotransmitter receptors located in the synapse?
on synaptic vesicles
on the postsynaptic membrane
on the presynaptic membrane
in the synaptic cleft
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Which structural component of the synapse contains neurotransmitters before an action potential arrives in the presynaptic neurone?
synaptic cleft
synaptic vesicles
presynaptic membrane
postsynaptic membrane
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Which structure of the synapse contains organelles involved in neurotransmitter production?
synaptic cleft
synaptic knob
neurotransmitter receptors
synaptic vesicles
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Synaptic transmission can be described as:
omnidirectional
unidirectional
multidirectional
bidirectional
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Which statement best describes the effect of summation at synapses?
makes postsynaptic firing less likely
prevents repeated presynaptic firing
increases likelihood of postsynaptic firing
releases inhibitory neurotransmitters
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Which statement about synaptic transmission is true?
requires repeated firing to be effective
designed to allow bidirectional transmission
can initiate multiple postsynaptic impulses
prevented by excitatory inputs
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What is the term for the strengthening of postsynaptic response when multiple presynaptic neurones converge on a single postsynaptic neurone?
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How do inhibitory synapses affect the postsynaptic membrane potential?
cause random fluctuations
cause hyperpolarisation
cause no change
cause depolarisation
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Which type of synapse prevents action potentials in the postsynaptic neurone?
inhibitory
summating
excitatory
spatial
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Which ion moves into the postsynaptic neurone during inhibitory synaptic transmission?
calcium
sodium
potassium
chloride
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What causes spatial summation at synapses?
release of inhibitory neurotransmitters
convergence of multiple presynaptic inputs
repeated presynaptic firing
weak synaptic stimulation
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What causes temporal summation at synapses?
hyperpolarisation of the postsynaptic membrane over time
inhibitory inputs outweighing excitatory inputs
convergence of spatial inputs preventing summation
continuous neurotransmitter release from repeated presynaptic firing
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