Middle Ear Cavity
The footplate of the stapes occupies the _________ window.
oval
The eustachian tube connects the _______ cavity to the nasopharynx
middle ear
The membranous labyrinth is filled with _________ fluid.
endolymph
The macula of the utricle responds to ________ stimulation
utricle
The eighth cranial nerve is referred to as the ________ nerve or the auditory nerve.
vestibulocochlear
The oval window opens into the scala __________.
Vestibuli
The eustachian tube permits _______ and pressure equalization.
drainage
The end organs of the inner ear are the _______ and saccule.
utricle
The _______ contain hair cells, otolithic membrane and otoconia.
maculae
The acoustic stapedial reflex is elicited by sounds that are _____ decibels above the threshold for hearing.
80-90 dB
The prominences of both the _____ semicircular canal and the _____ nerve canal are located on the medial wall of the middle ear cavity.
lateral
The _________ is attached to the tympanic membrane via the umbo
malleus
The end organ that the semicircular canals communicate with is the _________.
utricle
________ of the hair cells in the crista ampullaris extend into the gelatinous mass called the cupola.
Stereocilla
The size ratio of the tympanic membrane to the oval window results in an increase in acoustic pressure equal to __ decibels
25
The tympanic aditus is a major landmark of the _______ wall of the middle ear cavity.
posterior
The two tympanic muscles that attach to the ossicles are the ________ and tensor tympani muscle.
tensor tympani
The saccule and cochlear duct communicate via the _____________.
ductus reuniens
When ________ fluid pushes against the cupola, hair cell stereocilia bend and stimulate vestibular nerve fibers.
endolymph
There is an acoustic pressure increase of __ decibels due to the movement of the tympanic membrane in segments rather than as a whole.
6 dB
The eustachian tube is located on the _______ wall of the middle ear cavity.
Eustachian
The function of the acoustic stapedial reflex is _______ control and creating an improved signal-to-noise ratio
intensity
The ________ nerve, ________ nerve and internal branch of the basilar artery pass through the internal auditory meatus.
auditory nerve; facial nerve
The visual, vestibular and ____________ systems work together to maintain a human’s center of gravity.
Somatosensory
Two important muscles for eustachian tube dilation are the ______ and _____ veli palatini muscles.
tensor and elevator veli palatini muscles