Lecture (3/19) Week 9 Tuesday Flashcards

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1
Q

stereocilia sit on top of what

A

outer and inner hair cells

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2
Q

Stereocilia are made of ______ which is a contractile

A

actin, protein

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3
Q

Is kinocilium thicker or thinner than stereocilia?

A

thicker

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4
Q

Which types of cells have sternocila

A

OHC and IHC

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5
Q

IHC stereocilia are positioned in a _____

A

row

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6
Q

OHC stereocilia are positioned in a _____

A

V or W shape

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7
Q

_____ are the most lateral cilia on each hair

A

kinocilium

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8
Q

kinocilium are towards the _____ _____

A

stria vascularis

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9
Q

the stereocilia and kinocilium are connected via _____

A

proteins

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10
Q

T/F stereocilia and kinocilium have the same ionic channels

A

False

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11
Q

What allows for stereocilia movement

A

actin

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12
Q

stereocilia are attached to one another via _____ called _____

A

actin fibers, tip links

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13
Q

T/F only the top of stereocilia move

A

False.
The entire piece moves together, not just the top

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14
Q

What are the two ways stereocilia are connected?

A

Tip links
Lateral links

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15
Q

______ sits on top of sensory cells

A

tectorial membrane

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16
Q

the tectorial membrane is connected at one end of the ______

A

spiral limbus

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17
Q

the tectorial membrane is _____ tissue made of _____

A

connective
collagen

18
Q

What is connected to the tectorial membrane?

A

OHC

19
Q

What is Hensen’s stripe?

A

Where the stereocilia of the OHC connect into the holes of the bottom side of the TM

20
Q

Do IHC and OHC connect to TM?

A

no, only OHC

21
Q

Energy passes through the middle ear as _____ energy

A

vibratory (mechanical)

22
Q

where does the stapes footplate vibrate?

A

Oval window

23
Q

____ ____ travels along the cochlear partition and is released at the ____ ____

A

displaced fluid, round window

24
Q

pressure on the _____ _____ moves the basilar membrane

A

scala media

25
Q

the base of the BM has more ____ and less ____

A

bone, membrane

26
Q

base of the BM has a _____ resonant frequency

A

higher

27
Q

apex of the BM has a ______ resonant frequency

A

lower

28
Q

T/F entire BM is set into movement at the same time

A

false

29
Q

What is the traveling wave?

A

hydromechanical wave moves from base to apex

30
Q

the traveling wave reaches maximum displacement at the point on the BM that is “tuned” to the ___ ___

A

input frequency

31
Q

The traveling wave illustrates

A

place of theory of hearing

32
Q

Bekesy’s Results

A

when a high frequency played, the silver particles near the base moved
when a low frequency tone played, the particles near the base moved slightly, but most movement was towards the apex

33
Q

Bekesy passive tonal organization

A

specific frequencies correspond to specific anatomical sites- first place tonotopic organization

34
Q

the amplitude of BM movement is greater at the

A

apex (low frequencies)

35
Q

the speed of BM movement is greater at the

A

base (high frequencies)

36
Q

when the sound wave is rarefactioned
hair cell _____

A

depolarization

37
Q

sound wave is compression
hair cell ____

A

hyperpolarization

38
Q

OHC elongate when

A

hyperpolarize

39
Q

OHC contract when

A

depolarized

40
Q

Electromobility of OHC

A

when the OHC contract or elongate due to the proteins in the stereocilia and cell body

41
Q
A