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Neuron: Difference between revisions
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==Structure== | ==Structure== | ||
[[File:MRuueFj.png| | [[File:MRuueFj.png|320px|thumb|right|Structure of the neurone (click to expand)]] | ||
A typical neurone possesses a cell body (often called the soma), dendrites, and an axon. Dendrites are thin structures that arise from the cell body, often extending for hundreds of micrometres and branching multiple times, giving rise to a complex "dendritic tree." An axon is a special cellular extension that arises from the cell body at a site called the axon hillock and travels for a distance. At the majority of synapses, signals are sent from the axon of one neurone to a dendrite of another. There are, however, many exceptions to these rules. For example, neurones that lack dendrites, neurones that have no axon, and synapses that connect an axon to another axon or a dendrite to another dendrite, etc. | A typical neurone possesses a cell body (often called the soma), dendrites, and an axon. Dendrites are thin structures that arise from the cell body, often extending for hundreds of micrometres and branching multiple times, giving rise to a complex "dendritic tree." An axon is a special cellular extension that arises from the cell body at a site called the axon hillock and travels for a distance. At the majority of synapses, signals are sent from the axon of one neurone to a dendrite of another. There are, however, many exceptions to these rules. For example, neurones that lack dendrites, neurones that have no axon, and synapses that connect an axon to another axon or a dendrite to another dendrite, etc. | ||
[[File:Axon.png| | [[File:Axon.png|330px|thumb|right|Structure of axon membrane]] | ||
==Propagation of action potentials== | ==Propagation of action potentials== | ||