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15 Cards in this Set
- Front
- Back
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Central Neverous System
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mkes up the brain and spinal cord
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Peripheral Nervous System
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Sensory and motor nerons is part of this system
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Nerve
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consists of one or mome bundles of neuron fibers surrounded by three main functions
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Sensory neurons
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carry information about stimuli to the CNS.
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sensory receptors
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stimuli recieves specialized cell that transmits signals to sesnory neurons
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motor neurons
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carry signals away from the CNS
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reflex
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automatic response
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dendrite
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neuron fiber that receives signals and carries them toward the cell body
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axon
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neuron fiber that carries electric impulses away from the cell body and toward other cells
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resting potential
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polariized, a voltage across the plasma membrane of a resting neuron
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threshold
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minimum change in a membrane's voltage that must occur to generate an action potential
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action potential
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nerve impulse, depolarized
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synapse
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junction betweena terminal and next dendrite
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neurotransmitter
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chemical messenger that carries information from one neuron to another or to another cell
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somatic
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subdivision of the motor division of the peripheral nervous system that controls the voluntary movement of skeletal muscles
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