Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Anatomy and Physiology > Anatomy of the Inner Ear and Cochlea > Flashcards

Anatomy of the Inner Ear and Cochlea Flashcards

1
Q

inner ear versus the labyrinths

A

same thing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

houses sensory ends organs of auditory and vestibular systems

A

inner ear

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

where are the labyrinths located

A

petrous portion of the temporal bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

anatomy of the inner ear is dominated by large fluid filled spaces which are essential for ________

A

signal transduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what 2 primary components can the labyrinths be split into

A

1) bony labyrinth
2) membranous labyrinth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

vestibule
cochlea
semicircular canals
- post., sup., lat. (horizontal)

A

bony labyrinth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

maculae
utricle
saccule
cochlear duct
semicircular ducts
- post.,sup.,lat. (horizontal)
endolymphatic duct/sac

A

membranous labyrinth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what does bony labyrinth contain

A

perilymph

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what does a membranous labyrinth contain

A

endolymph

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

typical extracellular fluid that is high in Na+ and continuous with CSF in subarachnoid space

A

perilymph

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

very atypical extracellular fluid that is high in K+ and has varying compositions throughout membranous labyrinth (result of K+ pumps) and communicates w/ venous structures of dura mater

A

endolymph

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

______ results from different compositions of perilymph and endolymph

A

endocochlear potential

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

endocochlear potential primary consists of ____ ions

A

K+

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

endolymphatic potential is approx. what at cochlea and varies through endolymphatic space

A

+85 mV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

endocochlear potential provides the basis for _________ in sensory hair cells

A

signal transduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

resting membrane potential

A

-50mV

17
Q

what are the two forces that endocochlear potential results from

A

1) active addition of K+ into endolymph
2) passive removal of K+ from hair cells

18
Q

what is the oval shaped central portion of the bony labyrinth

A

vestibule

19
Q

what communicates with cochlea, SCC, and middle ear space

A

vestibule in bony labyrinth

20
Q

what receives incoming sound stimulus energy from the ME via the OW and dissipates that energy via RW

A

vestibule in bony labyrinth

21
Q

what is the snail-shaped bony canal with a central bony axis called modiolus

A

cochlea in bony labyrinth

22
Q

where does the association with the cochlear duct create 3 separate spaces or scale on cross section of the spiral

A

cochlea in bony labyrinth

23
Q

what is elliptical in shape in the membranous labyrinth

A

utricle

24
Q

what is connected to saccule via utriculosaccular duct and has a sensory epithelium called a macula

A

utricle in the membranous labyrinth

25
Q

what has otolithic membranes that overlies macula to facilitate sterociliary deflection

A

utricle in the membranous labyrinth

26
Q

what labyrinth is globular in shape and has the macula oriented in vertical plane

A

saccule in the membranous labyrinth

27
Q

what is the scala media another name for

A

cochlear duct

28
Q

what does the cochlear duct or scale media contain

A

sensory epithelium of the cochlea

29
Q

what do semicircular ducts do

A

communicate with utricle and has dilation at one end called ampulla and contains crista ampullaris with a gel-like cupla over the crista ampullaris

30
Q

what originates from the utriculosaccular duct

A

endolymphatic duct/sac

31
Q

what is the site of endolymph removal to venous drainage

A

endolymphatic duct/sac

32
Q

what fluid is found within the membranous labyrinth

A

endolymph

33
Q

what tissue is responsible for special composition of endolymph

A

stria vascularis

34
Q

where is the stria vascularis tissue located?

A

lining the lateral wall of the cochlear duct

35
Q

________ can excess endolymph and be released and it [does/does not] imply that there is a natural “flow” of endolymph through the membranous labyrinth

A

stria vascularis; does

36
Q

what are the inner ear structures that house sensory epithelia

A

organ of corti
(1) saccule
(1) utricle
(1 for each) ampulla

37
Q

CN VIII (vestibulocochlear nerve) and the CN VII (facial nerve)

A

the structures that pass through the internal auditory meatus

38
Q

the organ of Corti

A

Anatomy and Physiology (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions