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Histology > L5 The Ear > Flashcards

L5 The Ear Flashcards

1
Q

What are the fnx of the ear?

A

hearing and equlibrium

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2
Q

What does the outer ear consists of?

A

auricle or pinna
External auditory meatus
Tympanic membrane

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3
Q

What does the middle ear consist of?

A

tympanic cavity
Eustachian tube
auditory ossicles
Oval and round windows

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4
Q

What are the two main parts of the inner ear?

A

Bony and membranous labyrinth

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5
Q

What structures does the bony labyrinth contain?

A

vestibule
semicircular canal
cochlea

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6
Q

What structures does the membranous labyrinth contain?

A

utricle+saccule
semicircular ducts
cochlear ducts

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7
Q

What are the auricle, external meatus, and tympanic membrane covered w?

A

skin

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8
Q

What lines the tympanic cavity?

A

endoderm derived simple squamous epi.

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9
Q

What lines the eustachian tube?

A

ciliated pseudostratified columnar epi

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10
Q

What separates the middle and inner ear?

A

oval and round windows

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11
Q

what muscles does the middle ear contain

A

stapedius
tensor

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12
Q

what are the auditory ossicles?

A

incus
malleus
stapes

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13
Q

What fluid is kept in bony labyrinth?

A

perilymph

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14
Q

What fluid is kept in membranous labyrinth?

A

endolymph

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15
Q

What are the receptor cells in the inner ear?

A

stereocilia called hair cells

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16
Q

What do all 3 receptor organs in the inner ear have?

A

sensorineural transduction system

17
Q

What type of membrane does the organ of corti have?

A

basilar

18
Q

What is an example of vascularized endothelium/

A

stria vascularis

19
Q

What does the organ of corti contian?

A

hair cells

20
Q

What displaces the cupula and stimulates cells?

A

endolymph

21
Q

T/F kinocilium can be lost at old age

A

True

22
Q

What does the membranous labyrinth develop from?

A

otic vesicle

23
Q

What does the outer ear develop from?

A

1st pharyngeal groove

24
Q

What does the middle ear develop from?

A

1st pharyngeal pouch

Histology (6 decks)

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