new_n_lost
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Damage to which of the following structures might produce hair cell loss?
A. Basilar membrane
B. Organ of Corti
C. Reissner's membrane
D. Scala tympani
E. Scala vestibuli
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| po
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C?
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| Jackofknives
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Damage to Reissner's membrane as well as the disruption of ionic concentrations in D and E would produce non-functioning hair cells but not necessarily cell loss. The question asks about structures right? I.e. in plural, then I’d say A and B.
Edited by Jackofknives on 07/07/07 - 01:31 AM
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| forumdoctor
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B
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| mytime
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I wud say B too.....but u not sure.
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| new_n_lost
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| new_n_lost
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The correct answer is B.
The structure of the cochlea is complex. The organ of Corti contains hair cells from the cochlear branch of the vestibulocochlear nerve (CN VIII).
These cells rest on the basilar membrane (choice A), which separates the scala tympani (choice D) from the scala media. The hairs of the hair cells are embedded in the tectorial membrane, and movement of the basilar membrane below the cells tends to bend the hairs, which generates action potentials by the hair cells.
The tectorial membrane that lies on the hair cells does not form a boundary between the different scala; the membrane separating the scala media from the scala vestibuli (choice E) is Reissner's (vestibular) membrane (choice C).
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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
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