Term
| The external ear terminates at the |
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Definition
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Term
| The canal is lined by skin that contains ______ _____ that secrete _______ that protects the skin from insects and waterproofs the surface. |
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Definition
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Term
| The contents of the middle ear are the |
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Definition
ear ossicles
tensor tympani
stapedius muscles
chorda tympani nerve (petrotympanic fissure)
lesser petrosal nerve
tympanic plexus of nerves (CN IX) |
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Term
| Chorda tympani n. is a branch of the |
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Definition
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Term
| The inner ear is composed of the |
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Definition
| osseous labyrinth and the membranous labyrinth |
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Term
| The inner ear functions in reception of _____ (cochlea)and maintenance of _______ (vestibule). |
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Definition
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Term
| Sensory input into the vestibulocochlear apparatus is transmitted to the brain via |
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Definition
| CN VIII- vestibulocochloear nerve |
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Term
| The bony labyrinth is filled with |
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Definition
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Term
| The ____ labyrinth is a fluid-filled space occupied by the ______, vestibule, and ___________ _______ surrounded by the otic capsule which is part of the ______ portion of the _______ bone. |
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Definition
bony
cochlea
semicircular canals
petrous
temporal |
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Term
| The membranous labyrinth is divided into the |
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Definition
| vestibular labyrinth and the cochlear labyrinth |
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Term
| The membranous labyrinth contains |
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Definition
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Term
| Perilymph is similar to __________, while endolymph is simmilar to _________. |
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Definition
extracellular fluid or CSF;
intracellular fluid |
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Term
| The utricle and saccule are contained in the |
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Definition
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Term
The three semicircular canals, ________,_________ and _______, communicate with the vestibule of the bony labyrinth and have an _______ at one end.
Each canal is ____ of a circle and have a total of __ openings to the vestibule of bony labyrinth. |
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Definition
anterior, posterior, lateral
ampulla;
2/3; 5 |
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Term
| The utricle and saccule have specialized areas of sensory epithelium called the |
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Definition
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Term
| The _____ _____ in the maculae are supplied by the _________ branch of the vestibulocochlear nerve (CN VIII). |
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Definition
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Term
| The ampullary crest is a sensor for recording movements of __________ in the ampulla. |
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Definition
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Term
| The cochlear duct passes across the cochlear canal that divides the spiral canal filled with perilymph into two separate channels, the ______ ______ and ______ _______. |
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Definition
scala tympani
scala vestibuli |
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Term
| The scala vestibuli and scala tympani are filled with _________ and communicate at the ___________. |
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Definition
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Term
| The ______ window is continuous with the scala vestibuli. |
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Definition
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Term
| The _____ of the cochlear duct is the basilar membrane, while the ____ is the vestibular membrane |
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Definition
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Term
| The hair cells attached to the basilar membrane begin to vibrate when the tympanic membrane vibrates and perturbs the malleus, incus, and stapes which then perturb the perilymph in the scala vestibuli and the scala tympani, then vibrates the basilar membrane and thus the organ of Corti as it lies on the basilar membrane. |
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Definition
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Term
| The auditory receptor of the ear is the _____ __ _____ and it lies on the basilar membrane. |
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Definition
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Term
| The scala media (cochlear duct) is separated from the scala vestibuli by the ________ _______. |
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Definition
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Term
| another name for the cochlear duct is the |
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Definition
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Term
| By movement of the basilar membrane and organ of Corti the _________ of hair cells become disturbed and _____________ of the hair cells results. |
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Definition
stereocilia
depolarization |
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Term
| _____ and _____ pillar cells are attached to the basilar membrane. |
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Definition
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Term
| The _____ ______ separates the inner hair cells from the outer hair cells. |
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Definition
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Term
The vestibulocochlear nerve (CN VIII) is composed of the ________ and ________ nerves.
The cochlear nerve is composed of fibers from the ______ _______ which bifurcate as they enter the cochlear nuclei.
The vestibular nerve arises from bipolar cells in the _______ ________. |
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Definition
cochlear and vestibular;
spiral ganglion;
vestibular ganglion |
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Term
____ _____ carried by the external ear are translated into mechanical vibrations of the tympanic membrane.
These vibrations are transferred to the ear ossicles, which in turn generate a wave at the ____ _______ of the cochlea |
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Definition
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Term
Sound waves generated at the oval window are transferred to the _____ ________ of the cochlea.
The wave passes to the scala tympani via the __________ to the ______ _______. |
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Definition
scala vestibuli
helicotrema
round window |
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Term
| Movement of the basilar membrane and the organ of corti causes a ______ _______ of the hair cells on the basilar membrane. |
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Definition
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Term
| Endolymph is only found in the |
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Definition
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Term
| Perilymph is contained in the |
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Definition
| scala vestibuli and scala tympani |
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Term
| The __________ is found at the apex of the cochlea and serves as a conduit for perilymph between the scala tympani and scala vestibuli |
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Definition
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Term
| another name for the vestibular membrane |
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Definition
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Term
| The basilar membrane separates the |
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Definition
| scala media and the scala tympani |
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Term
| There are ___ rows of outer hair cells (OHC)and __ row of inner hair cells (IHC). |
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Definition
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