The segment includes both dendrites and the cell body, which are the regions of the neuron that receive stimuli to excite the neuron. channels in this region are ; no significant numbers of channels are present.
• the segment is composed of the axon hillock. this segment contains voltage-gated channels.
• the segment is equivalent to the length of the axon. it contains voltage-gated channels.
• the segment includes the synaptic knob and contains voltage-gated channels and .
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