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 the postsynaptic membrane
in the synaptic cleft
on synaptic vesicles
on the presynaptic membrane
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Which structural component of the synapse contains neurotransmitters before an action potential arrives in the presynaptic neurone?
synaptic vesicles
postsynaptic membrane
synaptic cleft
presynaptic membrane
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Which structure of the synapse contains organelles involved in neurotransmitter production?
synaptic vesicles
neurotransmitter receptors
synaptic knob
synaptic cleft
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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?
releases inhibitory neurotransmitters
makes postsynaptic firing less likely
prevents repeated presynaptic firing
increases likelihood of postsynaptic firing
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Which statement about synaptic transmission is true?
requires repeated firing to be effective
can initiate multiple postsynaptic impulses
prevented by excitatory inputs
designed to allow bidirectional transmission
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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 hyperpolarisation
cause depolarisation
cause no change
cause random fluctuations
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Which type of synapse prevents action potentials in the postsynaptic neurone?
spatial
inhibitory
summating
excitatory
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Which ion moves into the postsynaptic neurone during inhibitory synaptic transmission?
sodium
chloride
calcium
potassium
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What causes spatial summation at synapses?
weak synaptic stimulation
convergence of multiple presynaptic inputs
repeated presynaptic firing
release of inhibitory neurotransmitters
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What causes temporal summation at synapses?
inhibitory inputs outweighing excitatory inputs
hyperpolarisation of the postsynaptic membrane over time
continuous neurotransmitter release from repeated presynaptic firing
convergence of spatial inputs preventing summation
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