HEARING part I

Question 1

the ability to perceive sounds

Answer 1

HEARING

Question 2

2 fundamental units of the ear

Answer 2

• auditory apparatus - for hearing
• vestibular apparatus - for balance

Question 3

the ear is divided in 3 main regions:

Answer 3

• external
• middle
• internal

Question 4

which collects sound waves and
channels them inward

Answer 4

external ear

Question 5

which conveys sound vibrations to the oval
window

Answer 5

middle ear

Question 6

which houses the receptors for hearing and equilibrium

Answer 6

internal ear

Question 7

parts of external ear

Answer 7

• auricle/pinna
• external auditory meatus/canal
• tympanic membrane/eardrum

Question 8

• Is a flap of elastic cartilage shaped like the flared end of a trumpet and covered by skin

Answer 8

AURICLE/PINNA

Question 9

• upper portion of auricle/pinna

Answer 9

RIM (HELIX)

Question 10

• inferior portion of auricle/pinna

Answer 10

LOBULE

Question 11

• is a curved tube about 2.5 - 3 cm (1 in.)
  long that lies in the temporal bone and leads to the eardrum

Answer 11

external auditory meatus/canal

Question 12

the external auditory canal contains a
few hairs and specialized sweat glands called

Answer 12

ceruminous glands

Question 13

ceruminous gland secrete

Answer 13

earwax/cerumen

Question 14

• is a thin semi-transparent membrane that
  separates the external ear from the middle ear

Answer 14

tympanic membrane/eardrum

Question 15

what is the primary function of eardrum

Answer 15

directs sound waves to the middle ear

Question 16

A small, air-filled cavity that lies in the temporal bone
Separated from the external ear by the tympanic membrane or eardrum & from the
internal ear by a thin bony partition

Answer 16

middle ear (tympanic cavity)

Question 17

tympanic cavity contains 2 membrane-covered openings called

Answer 17

• oval
• round window

Question 18

parts of the middle ear

Answer 18

• auditory/eustachian tube (pharyngotympanic tube)
• auditory ossicles (malleus, incus, stapes)

Question 19

Connects the middle ear to the nasopharynx

Answer 19

auditory/eustachian tube

Question 20

primary function of auditory tube

Answer 20

equalizes air pressure on both sides of the tympanic
membrane

Question 21

It Includes the 3 smallest bones of the body and named after their shapes. It is connected by synovial joints

Answer 21

auditory ossicles

Question 22

primary function of auditory ossicles

Answer 22

transmit sound waves from the eardrum to the fluid in the cochlea thru the oval window

Question 23

– its handle is attached to the internal surface of the
tympanic membrane and its head articulates with the body of the incus

Answer 23

malleus/hammer

Question 24

what shape is the malleus

Answer 24

hammer

Question 25

middle bone; articulates with the head of the stapes

Answer 25

incus/anvil

Question 26

what is the shape of incus

Answer 26

anvil

Question 27

its base or footplate fits into the oval window

Answer 27

stapes/stirrups

Question 28

what is the shape of stapes

Answer 28

stirrups

Question 29

other term for inner ear

Answer 29

labyrinth

Question 30

2 main divisions of inner ear/labyrinth

Answer 30

- outer bony labyrinth - inner membranous labyrinth

Question 31

- is a series of cavities in the petrous portion of the temporal bone

Answer 31

outer bony labyrinth

Question 32

outer bony labyrinth is divided in 3 areas:

Answer 32

- semicircular canals - vestibule - cochlea

Question 33

the outer bony labyrinth is lined with periosteum and contains fluid called

Answer 33

perilymph

Question 34

- snail-shaped (FOR HEARING) - It is a bony spiral canal that resembles the shape of a snail, making 3 complete turns

Answer 34

cochlea

Question 35

3 compartments of cochlea

Answer 35

- scala vestibule - scala tympani - scala media/cochlear duct

Question 36

- the upper passage above the bony partition and ends at the oval window

Answer 36

scala vestibule

Question 37

– the lower compartment below the bony partition; ends at the round window

Answer 37

scala tympani

Question 38

– lies between the scala vestibule & scala tympani

Answer 38

scala media/cochlear duct

Question 39

it separates the cochlear duct from the scala tympani

Answer 39

basilar membrane

Question 40

it separates the cochlear duct from the scala vestibule

Answer 40

vestibular membrane

Question 41

is an organ of hearing which consists of epithelial cells, supporting cells and hair cells

Answer 41

organ of corti/spiral organ

Question 42

receptors for auditory sensation

Answer 42

hair cells

Question 43

30-100 sterocilia (long, hair-like micorvilli)

Answer 43

hair bundles