Neuron: Difference between revisions
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A neuron is a [[Cell|cell]] that transmit electrical signals. There are 3 types of neurons: [[Motor neuron|motor]], [[Sensory neuron|sensory]] and [[Relay neuron|relay neuron]]. There are approximately 10<sup>11</sup> neuron cells in the central nervous system of an individual. A typical neuron consists of a cell body, [[Dendrites|dendrites]], [[Axon|axon]] and an [[Axon terminal|axon terminal]] <ref>Developmental Biology, 8th Edition, Scott F. Gilbert, Pg 394</ref>.<br> | A neuron is a [[Cell|cell]] that transmit electrical signals. There are 3 types of neurons: [[Motor neuron|motor]], [[Sensory neuron|sensory]] and [[Relay neuron|relay neuron]]. There are approximately 10<sup>11</sup> neuron cells in the central nervous system of an individual. A typical neuron consists of a cell body, [[Dendrites|dendrites]], [[Axon|axon]] and an [[Axon terminal|axon terminal]] <ref>Developmental Biology, 8th Edition, Scott F. Gilbert, Pg 394</ref>.<br> | ||
A neuron transmits electrical signals by [[Action_potentials|action potentials]]. These are triggered when the cell receives a chemical signal, such as the one from [[Acetylcholine|Acetylcholine]] binding to the post synaptic membrane, causing Sodium voltage-gated ion channels to open and Sodium to diffuse down its concentration gradient into the neuron causing [[Depolarisation|depolarisation]] (an electrical signal). | |||
=== References === | === References === | ||
<references /> | <references /> | ||
Revision as of 11:28, 10 November 2011
A neuron is a cell that transmit electrical signals. There are 3 types of neurons: motor, sensory and relay neuron. There are approximately 1011 neuron cells in the central nervous system of an individual. A typical neuron consists of a cell body, dendrites, axon and an axon terminal [1].
A neuron transmits electrical signals by action potentials. These are triggered when the cell receives a chemical signal, such as the one from Acetylcholine binding to the post synaptic membrane, causing Sodium voltage-gated ion channels to open and Sodium to diffuse down its concentration gradient into the neuron causing depolarisation (an electrical signal).
References
- ↑ Developmental Biology, 8th Edition, Scott F. Gilbert, Pg 394