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Neuron

Definition

noun, plural: neurons

An excitable cell that has specialized cell parts (such as soma, dendrites and axons), structures (such as synapses), and chemicals (such as neurotransmitters) for conducting nerve impulses


Supplement

Neurons are nerve impulse-conducting cells that make up nerves, brain and spinal column. Thus, they are regarded as the functional unit of the nervous system. A typical neuron has a nucleated soma and processes (axon and dendrites).

Neurons may be classified according to polarity:

  • bipolar neuron – a neuron in which the processes extend from opposite ends of the soma
  • (pseudo)unipolar neuron – a neuron in which the process extends from one end of the soma
  • multipolar neuron – a neuron in which an axon and several dendrites extend from the soma

Neurons according to the direction of nerve impulses:

  • sensory (or afferent) neuron – a neuron sending nerve impulses toward the CNS
  • motor (or efferent) neuron – a neuron sending nerve impulses away from the CNS to muscles or glands
  • interneuron – a neuron sending impulses to another neuron


Word origin: Greek neûron (sinew, cord, nerve)

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Too many ions inside a neuron cell. What happens?

... and this disorder often affects potassium channels, so there is practically no way that the excess sodium ions can escape as they rush into the neuron. What happens when (too many) sodium ions rush into a neuron cell, with no way of them escaping (defective or inactivated K channels)? What happens? ...

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by Coelacanth
Tue Dec 03, 2013 1:34 am
 
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Topic: Too many ions inside a neuron cell. What happens?
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Neurons..?!?

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by MedMad
Thu Oct 03, 2013 1:40 pm
 
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by fitzkefas
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Re: Processing of neurons

... two meanings, the primary one being to travel. I could be wrong but I seem to remember the word applies to the movement of the information from neuron to neuron. This is a mainly chemical process something to do with sodium and potassium ions if I remember correctly.

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by animartco
Sat Aug 24, 2013 10:16 am
 
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Is it possible to somehow activate touch sense neuron remot?

Is it possible to somehow activate touch sense neuron remotely, so feeling touch but not contacted. I heard that neuron is activated by electrical signal. and electrical signal can travel remotely. so .i'm curious about the title. I'm not a student ...

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by rar0308
Fri May 17, 2013 4:29 pm
 
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