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10 terms

Structure of a neuron

cell body
contains all the organelles; circularly shaped, large
fine threads found in cell body and extend into nerve fiber
nerve fibers that are short, highly branched, and neuron's main receptive surfaces; extend out of the cell body
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
layers of lipo-protein surrounding axons; sheath-like; layers secreted by Schwann cells
sheath located outside myelin made of cytoplasm and nuclei of Schwann cells
nodes of ranvier
narrow gaps in myelin sheath between Schwann cells