structure and function of a neuron
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13 Terms
what are neurons
-cells of the nervous system (aka nerve cells)
where are neurons located?
80% located in the brain
what do they do?
transmit signals electrically and chemically
what’s its role in the nervous system
means of communication
what extends from the cell body?
the dendrites
where is the nucelus?
in the cell body
what is the role of the dendrites
they carry electrical impulses from other neurons towards the cell body
what is the axon?
an extension of the neuron
what does the axon do?
carries the impulses away from the cell body
what is the xon covered by
myelin sheath (a fatty substance)
what is the main purpose of the myelin sheath?
to increase the speed at which the electrical impulses travel
what is the name for the breaks between the myelin sheath?
nodes of Ranvier
how big are the nodes of Ranvier?
0.2 to 2 mm