Histology Ear SIUmed

Question 1

hair cells of ear

Answer 1

columnar mechanoreceptor cells

Question 2

hair cells are found

Answer 2

• maculae of saccule
• maculae of utricle
• ampullae of semicircular canals
• organ of Corti
• EXCEPT; stria vascularis

Question 3

labyrinth comprise of

Answer 3

• saccule
• utricle
• semicircular canals
• scala media
• EXCEPT; scala tympani

Question 4

membranous labyrinth is filled with

Answer 4

endolymph

Question 5

fluid environment for hair cells

Answer 5

endolymph

Question 6

endolymph secreted by

Answer 6

stria vascularis

Question 7

stria vascular is located

Answer 7

scala media

Question 8

contains endolymph

Answer 8

scala media

Question 9

endolymph drain away from membranous labyrinth through a passage

Answer 9

endolymphatic duct

Question 10

imbalance between production and drainage of endolymph

Answer 10

meniere’s disease

Question 11

damage to hair cells in organ of Corti; effect on

Answer 11

hearing

Question 12

disturbance of hair cells in ampulla of semicircle canal; effect of

Answer 12

balance/vertigo

Question 13

disturbance of hair cells in macula of saccule; effect on

Answer 13

balance/vertigo

Question 14

disturbance of hair cells in macula of utricle; effect on

Answer 14

balance/vertigo

Question 15

perilymph fills

Answer 15

spaces of bony labyrinth external to membranous labyrinth

Question 16

contains perilymph

Answer 16

scala vestibuli

Question 17

otoliths found

Answer 17

saccule and utricle

Question 18

crest with cupola; feature of

Answer 18

ampulla of semicircular canal

Question 19

basal and tectorial membrane are most closely associated with

Answer 19

sensing vibratory stimuli (sound)

Question 20

organ of Corti, cilia and steriocilia are in intimate contact with

Answer 20

tectorial membrane

Question 21

hair cells in organ of corti synapse onto nerve fibers, located

Answer 21

spiral ganglion

Question 22

resigner’s membrane separate Scala media from

Answer 22

scala vestibuli

Question 23

basilar membrane separates the scala media from

Answer 23

scala tympani

Question 24

round window separates middle ear from

Answer 24

scala tympani

Question 25

middle ear communicates via the Eustachian tube with

Answer 25

nasopharynx