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Cards In This Set
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Nerve
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An individual nerve cell
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Dendrites
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Neuron fibers that recieve incoming messages
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Soma
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The main body of a neuron or other cell
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Axon
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Fiber that carries information away from the cell body of a neuron
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Axon terminals
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Branching fibers at the ends of axons
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Resting potential
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The electrical charge of a neuron at rest
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Action potential
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The nerve impulse
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Ion channels
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Tiny openings through the axon membranes
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Negative after-potential
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A drop in electrical charge below the resting potential
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Synapse
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The microscopic space between two neurons, over which messages pass
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Neurotransmitter
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Any chemical released by a neuron that alters activity in other neurons
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Receptor sites
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Areas on the surface of neurons and other cells that are sensitive to neurotransmitters or hormones
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Neuropeptides
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Brain chemicals, such as enkaphalins and endorphins that regulate the activity of neuron fibers
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Nerve
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A bundle of neuron fibers
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Myelin
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A fatty layer coating some axons
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