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IHS Questions- For License Prep Questions and Answers 100% Solved
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IHS Questions- For License Prep
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IHS Questions- For License PrepThe adult ear canal: - answerRises upward and forward then descends to the drum
The isthmus is: - answerWhere the canal narrows to enter the temporal bone
The pinna and the external canal together: - answer-Gather and reinforce accoustical
signals
-With the irregular shape of the auricle, cause increases and decreases at different
frequencies as the sound arrives at the ear.
-Forms a resonating tube.
The average resonant frequency of the ear canal plus concha is: - answer2700 Hz.
The dividing line between the external ear and the middle ear is the: - answerTympanic
membrane.
The ear canal contains: - answerCilia, ceruminous glands. sebaceous glands.
The vagus nerve (Xth cranial) is found: - answerAlong the bottom of the ear canal.
These are parts of the tympanic membrane: - answerPars tensa, Pars flaccida, Umbo.
An otoscopic inspection should reveal: - answerA clear view of the white tympanic
membrane.
These are parts of the pinna: - answerTragus, intertragal notch, triangular fossa.
Atresia refers to: - answerA closure of the external auditory canal.
Perforation of the eardrum can be caused by: - answer-An infection
-A fracture of the temporal bone
-A nearby explosion.
These are types of hearing loss: - answer-Conductive
-Central
-Sensorineural
Conductive losses may be caused by: - answerA prolapsed canal
Impacted cerumen
Which surgical technique repairs the tympanic membrane? - answerMyringoplasty
,A cholesteatoma can be described as: - answerA pouch of skin filled with epithelial
debris.
When an excess of cerumen or a blockage of cerumen is detected, the hearing aid
specialist should: - answerRefer the patient to a physician.
A swollen ear may be caused by: - answer-Eczema
-Otitis externa
-Dermatitis
Tympanosclerosis may be described as: - answerCalcium deposits.
A tympanic membrane perforation may cause a: - answerConductive loss.
Theoretically, the increase in sound pressure provided by the middle ear structure is
about: - answer27 dB.
The footplate of the stapes fits into the: - answerOval window.
A type "A" tympanogram would indicate: - answerNormal pressure and compliance.
The difference in area size between the tympanic membrane an the footplate of the
stapes increasing the sound pressure at the footplate is : - answerThe transfer function
or aerial ratio.
The middle ear cavity contains: - answerAnnular ligaments, malleus, stapes and tensor
tympani.
The middle ear system is often referred to as: - answerAn impedance matching
transformer.
The middle ear cavity, as a transducer changes energy from one form to another. The
energy changes from: - answerAcoustic energy to mechanical energy to hydraulic
energy.
The middle ear muscles contract, resulting in: - answerAn acoustic reflex.
The Eustachian tube begins in the lower portion of the tympanic cavity and ends at the:
- answerNasopharynx.
The Eustachian tube of a child is: - answerStraight, short, horizontal.
A cholesteatoma: - answer-Occurs in the middle ear
-May perforate the eardrum
-Is usually accompanied by a constant odorous discharge.
, Change in either stiffness or mass occur when the normal middle ear function is altered
by disease or trauma causing: - answerA feeling of stuffiness or a complaint of hearing
in a barrel.
Otosclerosis: - answerOccurs more often in women than men
Occurs more often in Caucasians than other races
Appears to be inherited
Most dysfunctions of the outer or middle ear cause a: - answerConductive loss.
Otitis media may occur with: - answerFluid in the middle ear.
A plastic or steel strut replaces the stapes during a: - answerStapedectomy.
Treatment for chronic otitis media may include: - answer-Antibiotics
-Inflation of the Eustachian Tube
-Myringotomy
A radical mastiodectomy incudes removal of: - answerOssicular chain, mastoid.
The ossicular chain is supported and suspended by: - answerStapedius, tensor tympani
and ligaments.
The ear, due to its physical characteristics, enhances which frequencies? -
answer2,000-5,000 Hz.
In a cross section of the cochlea, the minimum number of rows of hair cells you can see
is: - answer4
The total number of neural fibers or neurons in the human auditory nerve is about? -
answer30,000
The basilar membrane separates: - answerThe scala media and the scala tympani
The scala tympani is filled with: - answerPerilymph
The base of the cochlea: - answerbegins at the oval window
The fibers of the auditory nerve, at the point of maximum stimulation of the basilar
membrane, discharge and recover at a rate of approximately: - answerUp to 1Khz
identical to the stimulus frequency.
The cochlea, acting as a frequency analyzer, distributes acoustic stimuli to places along
the basilar membranes according to frequency, This forms the basis of a hypothesis
called the: - answerPlace theory.
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