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Axons

Axon

(Science: cell biology) a long process of a neuron, that carries efferent (outgoing) action potentials from the cell body towards target cells.

Each nerve cell has one axon, which can be over a foot long. A nerve cell communicates with another nerve cell by transmitting signals from the branches at the end of its axon. At the terminal end of the axon, the impulses are transmitted to other nerve cells or to effector organs.

in the peripheral nervous system, the larger (myelinated) axons are surrounded by a myelin sheath formed by concentric layers of plasma membrane of the schwann cell.

in the central nervous system, the function of the schwann cell is supplied by oligodendrocytes (oligodendroglia).

See: dendrite.


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Do We Have The Freedom Of Choice?

... and magnificent that we cannot even fully comprehend its awesomeness - but consists of these very same neurons that fire their signals across the axons based on the same principles that each an every neuron works. There is no free will involved, at least not in the base level of their operations. ...

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by biohazard
Wed Apr 03, 2013 9:44 am
 
Forum: Cell Biology
Topic: Do We Have The Freedom Of Choice?
Replies: 27
Views: 28879

what are the passive properties of the membrane?

Describe the contribution of passive electrical properties of membranes, to propagation of Action Potential along the myelinated axons. I know how action potential is generated, what myelinated axons are, but I am just confused about the active and passive properties of the membrane. This ...

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by Fa23
Sun Dec 09, 2012 6:38 pm
 
Forum: Physiology
Topic: what are the passive properties of the membrane?
Replies: 0
Views: 1752

Why do neurones only have one axon?

... can spread to multiple other neurones at a synapse and transmit signals very fast. I think what you actually want to know is would having multiple axons on a neurone speed up transmission of a nerve impulse and the answer to this i do not believe to be yes because neurones are insulated ( some ...

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by Drredfrizzle
Sun Nov 11, 2012 7:46 pm
 
Forum: Human Biology
Topic: Why do neurones only have one axon?
Replies: 1
Views: 2624

Why do neurones only have one axon?

... just learnt about neurones. I wonder why neurones have only one axon. Can they transmit nerve impulses faster and more rapidly when they have more axons? Does having more axons help in coordination? Could anyone tell me why neurons have only one axons? Thanks in advance.

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by startanewww
Thu Sep 27, 2012 11:39 am
 
Forum: Human Biology
Topic: Why do neurones only have one axon?
Replies: 1
Views: 2624

Re: [NEUROSCIENCE]-Two Questions about AP Propagation

I think the second question is referring to thicker axons having nodes of Ranvier and thus can perform saltatory conduction. This would decrease the need for Na+ channels. The answer to the first question sounds pretty reasonable.

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by hymenoptera7
Sun Aug 05, 2012 5:19 am
 
Forum: Human Biology
Topic: [NEUROSCIENCE]-Two Questions about AP Propagation
Replies: 5
Views: 5241
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