Test 1

Question 1

prevalence of those with hearing loss

Answer 1

35 million

Question 2

number over a period of time

Answer 2

incidence

Question 3

number is

Answer 3

prevalence

Question 4

prevalence rate is

Answer 4

incidence

Question 5

collects sounds and directs into aud. system

Answer 5

pinna

Question 6

little areas on pinna that hold air

Answer 6

concha

Question 7

shape of ext. ear canal

Answer 7

s shaped

Question 8

where ext. ear canal narrows

Answer 8

isthmus

Question 9

opening to ear canal

Answer 9

ext. auditory meatus

Question 10

where ear canal ends

Answer 10

tympanic membrane

Question 11

first ____ of ear canal is cartilagenous

Answer 11

2/3

Question 12

last ____ of ear canal is bony

Answer 12

1/3

Question 13

right under isthmus of ear canal

Answer 13

TMJ

Question 14

cone of light is

Answer 14

reflection you get off of ear drum

Question 15

2 distinctions of ear drum

Answer 15

pars flaccida

pars tensa

Question 16

layers of pars tensa

Answer 16

outer (continuous with skin)
fibrous layers
mucous layer

Question 17

layer of pars tensa that lines entire ME

Answer 17

mucous layer

Question 18

outer edge of ear drum

Answer 18

annulus

Question 19

middle of ear drum

Answer 19

umbo

Question 20

middle ear space

Answer 20

tympanum

Question 21

tympanum filled with

Answer 21

air

Question 22

function of middle ear

Answer 22

• conduct sound into IE

- boosts sound waves to overcome impedance mismatch

Question 23

Eustachian tube opens up into

Answer 23

nasopharynx

Question 24

what happens when Eustachian tube opens

Answer 24

the air pressure in ME will equal air pressure outside of ear

Question 25

Eustachian tube is normall open/close?

Answer 25

closed

Question 26

Eustachian tube lined with

Answer 26

mucosa

Question 27

where is CN VII located

Answer 27

medial wall of tympanum

Question 28

portals between ME and IE

Answer 28

oval and round window

Question 29

landmark of posterior wall of tympanum

Answer 29

mastoid bone

Question 30

why does mastoid bone have caves and channels

Answer 30

lightens load of the head

Question 31

superior wall of tympanum

Answer 31

epitympanic recess

Question 32

pulls malleolus inward

Answer 32

tensor tympani

Question 33

pulls stapes out

Answer 33

stapedial muscle

Question 34

pulls tympanic membrane in

Answer 34

tensor tympani

Question 35

acoustic reflex

Answer 35

tensor tympani and stapedial muscle ctx together in response to a sound

Question 36

purpose of acoustic reflex

Answer 36

way of protecting ME

Question 37

incus bulges into

Answer 37

bulge of epitympanic membrane

Question 38

what overcomes imp. mismatch

Answer 38

ossicular chain

Question 39

what does acoustic reflex do

Answer 39

reduces amplitude of loud sounds to protect ME

Question 40

behind oval window

Answer 40

vestibule

Question 41

perilymph is a

Answer 41

shock absorber

Question 42

endolymph

Answer 42

houses metabolites (blood, Na, K, etc)

Question 43

inner ear is a

Answer 43

labyrinth

Question 44

3 sections of IE

Answer 44

- cochlea - semicircular canal - vestibule

Question 45

cochlea function

Answer 45

hearing

Question 46

semi cir canal function

Answer 46

balance

Question 47

vestibule function

Answer 47

sensation of movement

Question 48

neuroepithelium takes form of

Answer 48

hair cells

Question 49

how sound wave travels through cochlea is

Answer 49

tonotopic organization

Question 50

how wave moves through cochlea

Answer 50

oval window --> perilymph --> base to apex --> travels to portion responsible for that freq

Question 51

base is ____ freq

Answer 51

high

Question 52

apex is ___ freq

Answer 52

low

Question 53

changes in energy through ear

Answer 53

acoustic --> mechanical --> hydraulic --> neuroelectric

Question 54

where nerve is channeled when it comes out of cochlea

Answer 54

internal auditory canal

Question 55

contains organ of corti

Answer 55

scala media

Question 56

First stage of aud development

Answer 56

auditory detection

Question 57

Second stage of aud development

Answer 57

auditory discrimination

Question 58

Third stage of aud development

Answer 58

auditory identification

Question 59

Fourth stage of aud development

Answer 59

auditory comprehension