Mod4Q1

Question 1

energy transducer

Answer 1

mechanism for converting energy from one form to another

Question 2

outer ear

Answer 2

pinna and ear canal; gathers and directs sound

Question 3

external auditory meatus (EAM)

Answer 3

external ear canal, terminating at tympanic membrane

Question 4

cartilaginous EAM

Answer 4

lateral 1/3 of canal; approx. 8mm

Question 5

osseus EAM

Answer 5

medial 2/3 of canal

Question 6

tympanic membrane

Answer 6

eardrum; transmits sound energy to ossicular chain

Question 7

speculum

Answer 7

instrument used to examine orifices and canals

Question 8

middle ear

Answer 8

everything from tympanic membrane to cochlea

Question 9

ossicles

Answer 9

bones of the middle ear

Question 10

malleus

Answer 10

“hammer”; first bone of ossicular chain

Question 11

incus

Answer 11

“anvil”; middle bone of ossicular chain

Question 12

stapes

Answer 12

“stirrup”; final bone of ossicular chain

Question 13

base or footplate of stapes

Answer 13

rests in the oval window; flat bottom part of “stirrup”

Question 14

oval window

Answer 14

opening into the scala vestibuli (vestibular duct) to which the stapes is attached

Question 15

serous otitis media

Answer 15

infection of the middle ear

Question 16

middle ear effusion

Answer 16

fluid buildup in middle ear does not allow vibration of tympanic membrane

Question 17

round window

Answer 17

opening between the scala tympani and the middle ear

Question 18

What are the functions of the pinna (auricle)?

Answer 18

gathers and directs sound

Question 19

What is the function of the cerumen (earwax)?

Answer 19

removes debris, keeps foreign bodies out

Question 20

What is the function of the ossicular chain?

Answer 20

translates sound energy from tympanic membrane to inner ear

Question 21

What is the ordering of the bones of the ossicular chain from lateral to medial?

Answer 21

malleus, incus, stapes