Flashcards in Neuroglia & glial cells Deck (12):
provide? how many? located? known as? what don't they do?
aka glial cells
provide various support functions to neurons
5-50 times more numerous than neurons
found in CHS & PNS
DO NOT conduct or carry impulses
readily multiply & divide
"glue" of nervous tissue
what are the 4 types of neuroglia in the CNS
functions? description? attached to?
star shaped, largest & most numerous
attached to blood capillaries & neurons
-restricts movement of substances btwn blood & neurons of CNS (cerebrospinal fluid)
provide nutrients to neurons (blood carries nutrients)
regulate ion concentrations
remove excess neurotransmitters (too much ACh is bad)
produce & maintain myelin
acts as phagocytes
-remove damaged nerve tissue & invading microbes
description? location? function?
simple squamous or columnar shape
line brain ventricles & central canal of spinal cord
-protects & nourishes CNS
produce & assist in circulation of cerebrospinal fluid
2 types of neuroglia in PNS are?
form myelin sheath around axons
aids in regeneration of damaged PNS nerve fibers (usually sensory)
flat cells, surround cell bodies located in PNS ganglia
provide structural support
regulate exchanges of material btwn cell body & interstitial fluid
whats interstitial fliud?
fluid btwn surrounding cells
what can neurons not do that neuroglia can
neurons cannot readily multiply & divide