Fuction of Synapses.

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  • Created by: Molly
  • Created on: 10-03-14 15:53
What is a synapse effectively?
A junction.
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Where is the neurotransmitter MADE?
In the pre-synaptic neurone.
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Where is the neurotransmitter stored?
In vesicles in the pre-synaptic neurone.
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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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Card 2

Front

Where is the neurotransmitter MADE?

Back

In the pre-synaptic neurone.

Card 3

Front

Where is the neurotransmitter stored?

Back

Preview of the front of card 3

Card 4

Front

What does it mean if a synapse has undirectionality?

Back

Preview of the front of card 4

Card 5

Front

what is summation?

Back

Preview of the front of card 5
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