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Structures of the Ear
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auditory tube
equalizes air pressure between the external ear and the middle ear cavity
auricle
collects sound waves and directs them toward the external acoustic meatus
basilar membrane
supports the organ of Corti
distorts in response to vibrations of the endolymph
cochlea
hearing
cochlear duct
processes sound waves
external acoustic meatus
sends sound waves to the tympanic membrane
malleus, incus, and stapes
transmit vibrations from the tympanic membrane to the oval window
amplifies vibrations
organ of Corti
supports the hair cells that detect sound
site of transduction (converting mechanical energy to APs)
outer hair cell
regulates the tension of the basilar membrane
oval window
transmits vibrations to the inner ear
round window
acts as a mechanical release for waves from within the cochlea
relieves pressure in the perilymph
scala vestibuli
transmit vibrations to the perilymph of the scala tympani
scala tympani
carries vibrations to the round window
semicircular canal and ducts
canal- detects kinetic or dynamic equilibrium (balance)
tectorial membrane
remains stationary as hair cells on the basilar membrane move
temporal bone
houses middle ear and the membranous labyrinth
tympanic cavity
allows tympanic membrane to vibrate
tympanic membrane
vibrates in response to sound waves
vestibule (utricle and saccule)
detects static equilibrium
vestibular membrane
transmits vibrations of the perilymph
seperates the cochlear duct and the scala vestibuli
vestibulocochlear nerve
carries info for balance to brain
Author
emilysouders
ID
81770
Card Set
Structures of the Ear
Description
functions
Updated
4/26/2011, 7:53:47 PM
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