hearing and deafness Flashcards
the cochlea is ______
a fluid filled membranous labyrinth floating in an osseous labyrinth
the cochlea contains ___, and consists of 3 parts:
2 fluid filled spiraling chambers, scala media or cochlear duct, scala vestibuli-upper chamber, scala tympani-lower c,hamber
the cross section of the cochlea shows an upper region _______ the middle region _____, and the lower region __________
scala vestibuli (perilymph Na), cochlear duct (scala media) (endolymph K), Scala tympani (Perilymph Na)
the _____ are arranged from ______ and when they bend _______ the taller hairs, they become ______
inner hair bundles short to tall, towards, depolarized
as the piston at the ossicle is moved from pressure at the oval windown, the scala vestibuli above the hair bundles (floating in gelatin), and as the basilar membrane goes up and down, the _______ against the hair bundles, which causes depolarization of the cell
tectorial membrane
pushing on the ______causes a pressure wave that presses the ______ back to the lower chamber of the _____ to make the round window bulge
scala vestibule, scala media osseous labyrinth
when hair cells are pushed ______ the taller hairs, the _____ rush into the cell, causing _____ and
towards, ca2+ activation of the primary affeerent fibers
if _______ can’t function, if the ____ potential is altered, if the _______ are damaged, you can’t ____
hair cells, endocochlear potential is altered, nerve endings, transduce the signal into a neural impulse causing hearing loss
the cochlea is lined above and below with ____
perilymph filled oseous labyrinth
the _____ is the section of the cochlea which contains the highest pitch regions, and the _____ is the section that contains the lowest pitches
base, apex
old age results in a ______ of _______
damage of hair cells at the base of the cochlea from repeated loud noise exposure (the highest pitched porition
