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10 terms

Structure of a neuron

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cell body
contains all the organelles; circularly shaped, large
neurofibrils
fine threads found in cell body and extend into nerve fiber
dendrites
nerve fibers that are short, highly branched, and neuron's main receptive surfaces; extend out of the cell body
axon
single nerve fiber that transmits impulse away from the axonal hillock of the cell body
chromatrophilic substance
found throughout cytoplasm and contains ribosomes-> protein synthesis
nerve fibers
tubular, cytoplasm filled fibers that conduct impulses to or from the cell body
schwann cells
neurological cell that is wound tightly around the axon and secretes myelin
myelin
layers of lipo-protein surrounding axons; sheath-like; layers secreted by Schwann cells
neurilemma
sheath located outside myelin made of cytoplasm and nuclei of Schwann cells
nodes of ranvier
narrow gaps in myelin sheath between Schwann cells