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| neural fibre that conducts impulses towards the cell body |
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| neural fibre that conducts impulses away from the cell body |
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| neurons that carry impulses into the CNS from a sense organ |
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| conduct impulses within the CNS, linking sensory & motor neurons |
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| carries electrical impulses from CNS to muscles or glands |
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| layer of fatty insulation round a nerve fibre (increases the speed of nerve impulse transmission) |
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| insulation of nerve fibres with myelin sheaths |
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| cell in the nervous system that physically supports neurons and produces myelin sheaths |
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| tiny organelle containing neurotransmitter; found in the pre-synaptic neurons |
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| chemical released into a synaptic cleft to transmit impulses to the next cell |
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| gap between neurons at a synapse |
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| protein found in the post-synaptic membrane that binds neurotransmitter |
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| membrane of the neurone that contains receptors for the neurotransmitters |
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| membrane of the neurone that releases neurotransmitters |
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| signal that affects a receptor and which can be passed on |
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| signal that affects a synaptic receptor but is not passed on |
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| pathway in which impulses from many neurons are passed to one neuron |
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| neurotransmitters involved in reducing the intensity of pain and other actions |
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| neurotransmitter involved in inducing the feeling of pleasure and other actions |
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| neural pathway that produces pleasure to reinforce particular behaviour |
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| a drug that mimics the action of a neurotransmitter |
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| drug that inhibits transmission of nerve impulses |
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| substance that changes neurochemistry; many are illegal |
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| increase in number or sensitivity of receptors as a result of exposure to antagonistic drugs - leads to drug addiction |
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| decrease in number or sensitivity of synaptic receptors as a result of exposure to agonist drugs – leads to drug tolerance |
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