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8 Cards in this Set
- Front
- Back
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Cell Body
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Life support center of the neuron
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Dendrites
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Branching extensions at the cell body. Receive messages from other neurons.
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Axon
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Long single extension of a neuron, covered with Myelin Sheath to insulate and speed up messages through neurons.
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Terminal Branches of Axon
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Branched endings of an axon that transmit messages to other neurons.
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Threshold
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Each neuron receives excitatory and inhibitory signals from many neurons. When the excitatory signals minus the inhibitory signals exceed a minimum intensity (threshold) the neurons fires an action potential.
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Synapse
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A junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron. The tiny gap is called synaptic gap or cleft.
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All-or-None Response
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A strong stimulus can trigger more neurons to fire, and to fire more often, but it does not affect the action potentials strength or speed.
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Intensity
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An action potential remains the same throughout the length of the axon.
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