neuroanatomy 1 Flashcards
are neurons exitable cells
yes
what is the funciton of neurons
carry impulses though action potentials
what are gilial cells
supporting cells, that are nuch smlaler than neruons
is there more dendries or axons
dendrites
what are the types of nurons
multipolar, bi polar, pseuodpolar
where are mulitpolar found
interneuorns and motor neurons
where are pseudounipolar neurons found
sensory
where are bi polar neurons found
olfactory mucosa and retinal nerve fibers
what is the function of the myelin sheaf
incresae speed of condution in axons
what forms the myelated sheaf in pns and cns
schwann celsl in pns
oligodendrocytes in cns
what is difference between white and grey mater
white mater is myelinated axons
grey mater is nneuroal cell bodies
what are salteis cel in the pns
they surround nerual cel bodies adn act as suppory
what are ependymal cells in the cns
act as line venticles ie.e incontact with csf and help to form bbb
funciton of microgilia
phagocytois
scar tissue formation
fucniton of astrocytes
surround synapes and cpapies helping to k+ buffering
how is bbb formed
endothelilum - with tight juncitons
astorcutes - acts as support network for endothelium
thick basla lamina
what cannot pas though blood brain barrier
harmul amion acids and ions
what can pas though bbb
water soluble molvues e.g
lipid soluble drugs
glucose and certain amion acids
funciton of cerebellem
balca and corodiation
functoin of cerebum
concinous
fucniton of brain stem
cardio resparoi centres
what connects lateral vencies to 3rd venticles
intreventiclar foramen
wher is teh the cerbal aquedcut
in the mid brain
where is teh 4th venticle
hind brin
