Neuron Flashcards
what is a neuron
fxnal and structural unit of the NS
what is a neuro specialized to conduct
info from one part of the body to another
parts of a neuron
cell body (soma)
one or more specialized, slender processes (axons/dendrites)
an input region (dendrites/soma)
a conducting component (axon)
a secretory (output) region (axon terminal)
how many neurons are in the brain alone
100-200 billion
mental code
pattern of neurons firing in several diff locations in the brain simultaneously
soma/perikaryon
cell body
contains nucleus plus most normal organelles
biosynthetic center of the neuron
what does the soma/perikaryon contatin
very active and developed rough endoplasmic reticulum
responsible for the synthesis of proteins
“Nissl body”
what else does the soma/perikaryon contain
neurofibrils
bundles of protein filaments
help maintain the shape, structure and integrity of the cell
neuronal processes
extensions from every neuron
2 types of neuronal processes
axon
dendrite
axons
normally 1 axon per neuron
transmits info from one neuron to another neuron
what does an axon begin with
axon hillock
length of an axon
less than a mm to over 1 meter
axonal hillock
where everything starts
axons have a
beginning = hillock
end = terminal
