Chapter 9 the outer ear

Question 1

The main function of the auricle/Pinna is to

Answer 1

catch sound and funnel it down the external auditory canal

Question 2

Cartilage in Pinna is very flexible in ______

Answer 2

children and the elderly

Question 3

Pinna

Answer 3

helps localize sound sources
direct sound into the ear
each individual’s pinna creates a distinctive imprin on the acoustic wave traveling into the auditory canal

Question 4

Pinna doesn’t have many blood vessels or fat which is why they are prone to _______

Answer 4

frostbites

Question 5

outer ear

Answer 5

mode of operation: air vibration

function: protection, amplification, localization

Question 6

outer ear ends at _______

Answer 6

tympanic membrane

Question 7

Concha

Answer 7

aids in the human ability to localize the sources of sounds that come from behind, below, and above the head.
Funnels sounds directed to it from the surrounding air into opening of the external auditory canal.

Question 8

helix is a good place of retention for ______

Answer 8

hearing aids

Question 9

ear wax (cerumen) is manufactured in _____

Answer 9

the outer portion of the external auditory canal

Question 10

External auditory canal (meatus)

Answer 10

The channel in the external ear from the concha of the auricle to the tympanic membrane.

Question 11

Cilia

Answer 11

eyelash-like projections of some cells that beat rhythmically to move certain substances over their surfaces

Question 12

Ear pain in the absence of infection may be caused by

Answer 12

temporomandibular joiint neuralgia

Question 13

otalgia

Answer 13

ear pain in adults

Question 14

The angle of the external auditory canal is different in children and adults

Answer 14

children: canal angles downward and more acute angle

Question 15

cerumen/ear wax

Answer 15

cleans ears. 
Repel water
trap dust, sand particles, micro-organisms, and other debris
moisturize epithelium in ear canal
odor discourages insects
antibiotic, antifungal propeties

Question 16

The tympanic membrane is situated at the end of the canal where it is protected from _______ and where it can be kept at a constant ________ and _______

Answer 16

trauma
temperature
humidity

Question 17

Tympanic membrane-ear drum compromises of 3 skin layers

Answer 17

outer layer of skin, middle layer of connective tissue, and an inner layer of mucous membrane

Question 18

pars flaccida

Answer 18

upper part of the tympanic membrane

Question 19

pars tensa

Answer 19

lower part of hte tympanic membrane

Question 20

Otoscopy

Answer 20

looking into the ear canal

Question 21

outer ear develops how many days after conception

Answer 21

28 days

Question 22

microtia

Answer 22

small external pinna

Question 23

anotia

Answer 23

absence of pinna

Question 24

Otoplasty

Answer 24

surgical procedure done when auricle protrudes markedly from the ear or when it is pressed tightly against the skull

Question 25

blockage or atresia

Answer 25

moderate conductive hearing losses

usually medically or surgically treatable

Question 26

surgical or traumatic

Answer 26

low mid frequency conductive

prosthetic available

Question 27

if auricle is missing in children

Answer 27

surgery is not advised

Question 28

atresia

Answer 28

congenital absent or closed ear canal

Question 29

hearing losses in the outer ear are caused by

Answer 29

occlusion

Question 30

myringoplasty

Answer 30

surgical repair of the tympanic membrane

Question 31

tympanosclerosis

Answer 31

tympanic membrane becomes thickened and scarred

Question 32

External otitis

Answer 32

infection of outer ear

Question 33

vibratory connection of ovular window connects ______ and ______ ear

Answer 33

middle and outer ear

Question 34

Ear canal collapse during pure-tone audiometry can lead to erroneous results. This collapse can be avoided through the use of

Answer 34

earphones ear plugs

Question 35

oscillator is places on the forehead for _____

Answer 35

bone conduction