ear

Question 1

the three subdivisions of the ear are

Answer 1

external ear
middle ear (tympanic cavity)
inner ear

Question 2

the external ear consists of the

Answer 2

auricle and the external acoustic meautus

Question 3

auricle is a

Answer 3

elastic fibrocartilollage covered by skin

Question 4

function of auricle

Answer 4

to collect air vibrations

Question 5

externakl acoustic meatus extends from the

Answer 5

auricle to thetympanic membrane

Question 6

external acoustic meatus framework is

Answer 6

lateral third is cartilaginous and medial two third is bony

Question 7

does teh auricle have extrinsic or intrinsic muscles or both

Answer 7

both

Question 8

motor nerv supply of the ear

Answer 8

facial nerve for all muscles of teh auricle

Question 9

cutaneous supply

Answer 9

lesser occipital nerve
auriculotemporal nerve
greater auricular nerve
auricular branch of vagus

Question 10

how does the tymapnic membrane lie

Answer 10

obliquely between the middle ear and teh external ear

Question 11

outer surface of the tympanic membrane

Answer 11

it contaisn a depressed surface called teh umbo

Question 12

inner surface of teh tymanic membrane

Answer 12

it give attachment to the handle of malleus (center)

Question 13

the middle ear description

Answer 13

air filled cavity of the petrous portion of temporal bone
lies between the external ear laterally and teh inner ear medially

Question 14

contents of teh middle ear

Answer 14

air, three bony ossciles, two muscles, vessels, nerves (chorda tympani and temporal plexus )

Question 15

roof of the tympanic cavity

Answer 15

tegmen tympani: thin plate of bone

Question 16

floor of the tympanic cavity

Answer 16

internal jugular vein

Question 17

lateraly eall of thhe tympanic cvaity

Answer 17

tympanic membrane

Question 18

posterior wall of tympanic cavity

Answer 18

vertcial part of facial nerve

Question 19

medial wall of tympamic cavity

Answer 19

promontory , oval and round window, horizantal part of facial nerve

Question 20

anterior wall of tymapnic cavity

Answer 20

phrayngeotymapnic tube 9 audiotroy tube) internal carotid artery and tensor tympani muscle

Question 21

function of phrayngeotympanic tube

Answer 21

it serves to equalize the air pressure in the tympanic cavity ad teh nasophraynx

Question 22

phrayngeo tympanic tube framework

Answer 22

posteriro inner third is bony and anterior two third is cartiligenous

Question 23

the audiotory ossicles

Answer 23

malleus ( hammer)
stapes ( stirrup)
incus ( anvil)

Question 24

muscles of the middle ear

Answer 24

tenspor tympani and stapedius

Question 25

stapedius nerve supply

Answer 25

facial nerve

Question 26

tensor tympani nerve supply

Answer 26

mandibular division of trigimenal nerve

Question 27

action of stapedius

Answer 27

dampens excessive noise vibratiosn

Question 28

action of tensor tympani

Answer 28

tenses tehtympanic membrane and pulls tehhandle of malleus medially

Question 29

inability to dampen loud noises is called

Answer 29

hyperacusis

Question 30

the inner ear consists of

Answer 30

auditory and vestibular structures filled with fluid

Question 31

function of the inner ear

Answer 31

hearing sound audiotory and maintaining the balance of the body vestibular

Question 32

inner ear location

Answer 32

situated within the petroud part of the temporal bione between the middle ear laterally and the internal acoustic meatus

Question 33

inner ear divisons

Answer 33

bony and membranous labyrinth

Question 34

what labyrinh is suspeneded within the bony labyrunth

Answer 34

membranous

Question 35

bony labyrinth consists of

Answer 35

vestibule, cochlea, and semicircular canals

Question 36

cochlea is responsile for

Answer 36

hearing

Question 37

vestibule is responsible for

Answer 37

balance while stationary
on its lateral wall lies
oval window enclosed by stapes and round window sealed by secondary tympanic membrane

Question 38

semicircular canals responsible for

Answer 38

balance while in motion
threee canals
anteriro posterior and lateral

Question 39

membranous labyrinth contaisn

Answer 39

perilymph

Question 40

membranous labyrinth conisists of

Answer 40

the vesitbular apperatures and the cochlear duct

Question 41

the vestibular apperatures afre

Answer 41

utricle, saccule, semi circular ducts

Question 42

the cochlear duct is

Answer 42

situated within the cochlea and is the organ responsible for hearing
scala tympani and scala vestibuli