Vestibulocochlear Nerve- I

Question 1

Vestibular Division on CN 8

Answer 1

Responds to movement of the head and the position of the head

Question 2

Responds to sound

Answer 2

Cochlear Division of CN 8

Question 3

The inner ear structures are embedded within the

Answer 3

temporal bone

Question 4

bony labyrinth and membranous labyrinth

Answer 4

inner ear structures

Question 5

hair cells

Answer 5

membranous labyrinth

Question 6

correct The bone labyrinth follows most of the contours of the membranous labyrinth

Answer 6

 The membranous labyrinth follows most of the contours of the bony labyrinth

Question 7

Consists of interconnected bony cavities and filled with perilymph

Answer 7

Bony Labyrinth

Question 8

perilymph

Answer 8

high na

low in K

Question 9

membranous ducts within the bony labyrinth

Answer 9

Membranous Labyrinth

Question 10

endolymph

Answer 10

(low in Na+ , high in K+ )

Question 11

endolymph

Answer 11

Membranous Labyrinth

Question 12

eventually reabsorbed

Answer 12

endolymph

Question 13

made by specialized cells in several locations in the membranous labyrinth.

Answer 13

endolymph

Question 14

leaves through a duct, to reach a sac to get to venous systme

Answer 14

endolymph

Question 15

[vertigo, nausea, hearing loss, ringing in the ears

Answer 15

obstruction of endolymph flow

Question 16

rank from ant to post

 Vestibule:

Semicircular Canals: 3 on each side: )

 Ampullae

Answer 16

vestibule ampullla semicircular canal

Question 17

central enlarged region of bony labrynth

Answer 17

vestibule

Question 18

dilation at one end of the each semicircular canals

Answer 18

ampulla

Question 19

function in complimentary pairing

Answer 19

L post+ r ant

Question 20

left horizontal and r. horizontal

Answer 20

function in complimentary paring

Question 21

Saccule:

Answer 21

Oriented vertically

Question 22

Oriented horizontally (when upright)

Answer 22

Utricle:

Question 23

located in the bony vestibule

Answer 23

utricule sacule

Question 24

linear (horizontal) acceleration

Answer 24

Utricle

Question 25

Detect angular acceleration 

Activated with most head movements

Answer 25

Semicircular canals

Question 26

Detects linear (vertical) acceleration (example?)

Answer 26

saccule

Question 27

static head position

Answer 27

utricle saccule

Question 28

Adjacent to the tallest stereocilia

Answer 28

the single kinocilium (

Question 29

project into endolymphatic interior of the membranous labyrinth

Answer 29

stereocilia

Question 30

endolymph

Answer 30

surrrounds stereocilia

Question 31

glutamate trigger and triggering CN 8 by

Answer 31

steeocilia

Question 32

moveing toward highest stereocilia

Answer 32

Opens the mechanically gated K+ ion channels •

K+ enters the cell •

Question 33

High intracellular K+ opens

Answer 33

voltage gated Ca+2 channels

Neurotransmitter is released (glutamate)

Question 34

neutral position of stereocilia

Answer 34

gate partially open