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46 Cards in this Set
- Front
- Back
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Auricle
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plate of elastic cartilage covered with skin
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1/3 of external auditory meatus is
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cartilagenous outer
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2/3 external auditory meatus
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temporal bone
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skin that lines the temporal section of external ear
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keratinized stratified squamous
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What produces earwax
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ceruminous glands
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tympanic membrane is covered with what cell type
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simple cubodial, with elastic CT
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What does tympanic membrane do
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transmit sound wave to ossicles
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middle ear communicate with the pharynx thru
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eustachian tube or auditory tube
and mastoid air cell |
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What does the eustachian tube do and the cell type
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opens during swallowing equalize pressure; psuedo str. columunar
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Name ossicles in order
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malleus, incus, stapes
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what cells cover the ossicle
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simple squamous
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how is sound wave transmitted in the middle ear
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tympanic membrane, malleus, incus, stapes, oval window
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Middle Ear lined with cell type
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simple cuboidal
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two membrane covered window
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oval and round
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sound guards
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two muscle inserted into malleus and stapes
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Internal ear function
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sense sounds vibration and head position
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Vestibule is in what part of the ear
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internal ear
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vestibule contains what two structure
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sacule an utricle
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cochlea is in what part of the ear
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inter ear
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Internal ear contain what three structure
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semicircular ducts, cochlea and vestibule
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Conchlea contain what nerve
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CN 8
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how many turns does the conchlea make
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2.5
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saccule and utricle contain what cell
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simple squamous
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The floor of saccule and lateral wall contain what and nerve
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maculae innervated CN8
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What two type of cells unique to the macula
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Type I and II receptor hair cell
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what covers the macula
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40-80 microvilli and long cilium
gelatinous glycoprotein and calcium carbonate crystal (otolith) |
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macula is sensitive to what
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linear acceleration and head position
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in the semicircular duct a ridge like receptor area perpendicular to the long axis
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ampulla
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cristae ampullaris has a conical gelatinous layer called
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cupula
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fluid in the semicircular ducts flow due to the inertia of
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endolymph
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how is the action potential tigger in the vestibular
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cupula move over crista ampullaris bending stereocilia
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how is the head position sensed in the vestibular
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displacement of otolith according to gravity and deformation of steriocilia
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what does the vestibular sense
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acceleration and deceleration and head postion
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what are the three canals of the cochlea
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scala vestibuli, scala media, scala tympani
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which canal of the cochlear duct contain endolymph
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scala media
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which canal of the cochlear contain perilymph
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scala vestibuli and tympani
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what structure is called the cochlear duct
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scala media
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what is the name of the membrane in the cochlear duct
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Reissner's membrane
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What lines the vestibular (reissner) membrane
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two layers of squmous ep.
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Where is the vestibular (reissner) membrane
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cochlear duct
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lateral wall is of cochlear duct
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stria vascularis
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what is believed to symthesize endolymph
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stria vascularis
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on the floor of cochlear duct
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organ of corti
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what has specialized auditory epithelium
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organ of corti
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cilium or steriocilia in the organ of corti
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steriocilia outer (3-5) rows inner (1 row) embedded in the tectorial membrane
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sound traveling thru the internal ear
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tympanic -> malleus -> incus -> stapes -> oval window -> perilymph -> vestibular and basilar membranes -> shearing steriocila -> tectorial membrane -> action ptential
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