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Neurons - Neurons impulses. parts,showninFigure1...

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Neurons A neuron is a cell that transmits nerve  impulses. It consists of the following  parts, shown in Figure 1: The cell body (soma or  perikaryon) contains the nucleus  and other cell organelles. There are clusters of rough  endoplasmic reticulum (not  shown in Figure 1) that are called  Nissl bodies or are sometimes  referred to as chromatophilic  substances.
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The dendrite is typically a  short, abundantly branched,  slender process (extension) of  the cell body that receives  stimuli. The  axon  is typically a long,  slender process of the cell body  that sends nerve impulses. It  emerges from the cell body at  the cone-shaped axon hillock.  Nerve impulses arise in the  trigger zone, generally located in  the initial segment, an area just  outside the axon hillock. The  cytoplasm of the axon, 
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the  axoplasm,  is surrounded by  its plasma membrane,  the  axolemma.
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