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21 Cards in this Set
- Front
- Back
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The receptor (sensory cells) of hearing are arranged on either side of the _______ ___ ________. A ________ row of inner hair cells on the _________ side and ____ rows of outer hair cells arranged in a very regular ___________ pattern on the outer side.
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rods of corti
single modiolar 3 geometric |
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Each ear has about ________ inner hair cells, arranged in a single row between the _________ __________ cells and the ________ rods. The _________ end of each hair cell is in contact with _______ endings and _________ cells.
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3500
inner phalangeal inner nerve supportive |
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The IHC needs the support of the ____________ ______ which reaches ___ ______ on the sides of it.
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phalangeal cell
up high |
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The OHC are ___________ in shape while the IHC are ________ in shape.
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cylindrical
droplet |
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The __________ cells of the OHC don't come up as _____ on their bodies as the phalangeal cells of the IHC.
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Deiters
high |
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The IHC has the same inclination as what?
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The Inner Rod of Corti
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What do the IHCs need to support them?
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phalangeal cells
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Approximately ____ IHCs/mm at the base (basilar membrane) and ____ IHCs/mm at the apex.
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80
115 |
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The cell body height of IHC remains _______ __________ throughout the _________.
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fairly consistent
cochlea |
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Each IHC is capped with a ___________ _______ at the apex of the cell.
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cuticular plate
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There is a _______ in the plate where the kinocillium was at one time. The kinocillium __________ in the later part of fetal life and only the _______ _____ remains on the ________ side of the cell. It is surrounded by an ___________ of __________ material.
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notch
disappears basal body modiolar aggregate granular |
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There are ____________ attached to the top of the cuticular plate of the IHC. They vary in ________ and ____________.
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stereocilia
length diameter |
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Sterocilia are _______ and __________. There are 2 _____ rows of sterocilia for each IHC. Those 2 rows are __________ to the axis of the __________ membrane/cochlea.
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stiff
resilient wavy parallel basilar |
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The ________ row of stereocilia is the longest for both IHC and OHC. There are approximately ___ stereocilia per IHC.
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outer
48 |
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The cilia are longest towards the ____ and the ________ and shortest towards the ______ and the _________.
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apex
outside base inside |
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There are about ________ OHCs in the ear. The entire cell and its cilia are covered with a well-defined _________ ___________. The OHCs have ________, unlike the IHCs. The OHCs respond primarily to _________ (radial) shearing.
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13,500
plasma membrane motility lateral |
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There are ___ rows of OHCs near the base of the cochlea and up to ___ rows near the apex of the cochlea. The ______ of the cell (not the cilia on top) are _________ at the apex and _________ at the base.
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3
5 body longer shorter |
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Similar to the IHCs, the OHCs have a ______ _____which is capped by a ________ ______ at the apex. They also have a ________ _______ where the kinocilium used to be. They have _____________ protruding from the cuticular membrane, which rise above the _________ ___________.
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cell body
cuticular plate basal body stereocilia reticular membrane |
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There are approximately ___ cilia/OHC at the apex and ____ cilia/OHC at the base.
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70
130 |
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The rows of steriocilia of the OHC form a ___ or a ___ at the base.
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V
W |
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Recall that the hair cells sit with their bases on top of the _______ ________. If a ______ is sent down the BM, there will be a ___________ along the BM that ______ the hair cell __________ (or radially), and that is what prompts the _________ ________ of the hair cell. NOT the ____________ ____________ of the BM.
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basilar membrane
wave distortion lateral neural action longitudinal motion |
