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11 Cards in this Set
- Front
- Back
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What two cells does the nervous system comprise of?
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Neurons Neurolglia |
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Neurons
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Sensing, thinking, remembering, controlling muscular activity, regulating glandular secretion, forms complex processing network in the brain and spinal cord, connects all regions of the body to the brain and spinal cord
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Neuroglia
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Smaller, but 25* more of them Support, nourish and protect neurons Maintain the interstitial fluid |
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What are the parts of a neuron?
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Cell body Dendrites Axon |
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Cell body
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Contains nucleus, surrounded by cytoplasm containing organelles
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Nerve fibres
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general term for any neural process (extension) that emerges from the cell body
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Dendrites
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Recieving / input portions of a neuron
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Axon
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propogates nerve impulses towards another neuron, muscle fibre or glad cell Long, thin cylindrical projection - often joins to the cell body |
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Synapse
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Site of communication between 2 neurons or between a neuron and an effector
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Synaptic vesicle
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Tiny membrane - enclosed sac, contains neurotransmitter
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Synaptic end bulbs
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Tip of an axon terminal that have swollen into bulb like structures
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