What does it mean if a synapse has undirectionality?
that the synapse can only pass impulses in ONE direction: from the pre-synaptic neurone to the post-synaptic neurone.
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what is summation?
low frequency action potentials often produce insufficient amounts of neurotransmitter which does not reach the required amount to over come the thresh hold. Summation ensures that they do.
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What is spatial summation?
When a number of different presynaptic neurones together release enough neurotransmitter to exceed the value.
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What is temporal summation?
When a single pre-synaptic neurone releases neurotransmitter many times over a short period to exceed the threshold value.
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What is inhibition?
When a synapse inhibits the passing of the action potential.
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Describe how a synapse can be inhibited?
If there is an inward diffusion of Cl (chlorine) the inside of the synapse is made even more negative. This makes it less likely that a new action potential will be created.
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Other cards in this set
Card 2
Front
Where is the neurotransmitter MADE?
Back
In the pre-synaptic neurone.
Card 3
Front
Where is the neurotransmitter stored?
Back
Card 4
Front
What does it mean if a synapse has undirectionality?
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