11. Inner ear Flashcards

1
Q

perilymph

A

fluid in the perilyphatic space of the inner ear, produced by filtration, thus its composition is the same as that of ther extracellular fluids

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2
Q

endolymph

A

fluid in the memranous labyrinth of the inner ear, produced by secretion, characterized by high K+ levels

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3
Q

hair cell

A

secondary sensory cell in the inner ear

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4
Q

stereocilium

A

processes on the apical surface of the hair cells filled with actin filaments and bearing mechanosensitive K+ channels at the tip

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5
Q

kinocilium

A

long process on the apical surface of the hair cells showing cilium structure in cross section

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6
Q

tip link

A

protein structure connecting the tips of the stereocilia; important for the deformation of the membrane and thus for the opening of the K+ channels during bending of the stereocilia

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7
Q

organ of the Corti

A

the organ of hearing in the inner ear

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8
Q

fenestra rotunda

A

membrane covered opening between the cochlea and the middle ear, it lets the perilymph move when the stapes pushes the membrane at the fenestra ovale

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9
Q

fenestra ovale

A

membrane covered opening between the cochlea and the middle ear, stapes transmit movement of the tympanic membrane to the perilymph through this opening

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