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neuroglia, transmitters and stuff

create myelin sheaths in CNS oligodendrocytes
create myelin sheaths in PNS schwann cells
destroy pathogens microglia
holds neurons in place and act as intermediary between capillaries and neurons astrocytes
membrane potential the inside of the cell is mostly negative
membrane potential the outside of the cell is mostly positive
normally found in higher concentration outside the cell NA+
normally found in higher concentrations inside the cell K+
if sodium channels open sodium will flow in causing depolarization
if potassium channels open, potassium will leave the cell causing hyperpolarization
resting membrane potential of a neuron -70mV
if a neuron is depolarized to -55mV an action potential will occur
non myelinated areas of the CNS appear as grey matter
myelinated areas appear as white matter
Created by: amandasoman