Anatomy Of The Ear
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Anatomy of the Ear
- 1.This collects acoustic sounds and funnels it to the eardrum...
- A.
Inner ear
- B.
Middle ear
- C.
Outer ear
- 2.What is the most severe type of hearing loss you can get from cerumen impaction?
- A.
Severe sensorineural
- B.
Moderate conductive
- C.
Severe conductive
- D.
Profound conductive
- 3.What are the 3 functions of the external ear?
- A.
Impedance matching, Localization, Protection
- B.
Protection, Amplification, Localization
- C.
Protection, Amplification, Pressure Equalization
- 4.A small air filled cavity lined with a mucous membrane....
- 5.Where are the ME and IE housed?
- 6.What is a concave, disk-like structure with invaginated portion pointed in toward the middle ear space?
- A.
Mastoid
- B.
Stapes
- C.
Tympanic membrane
- D.
Scala vestibuli
- 7.What is the order of the TM layers, outer to inner?
- 8.Largest bone in the ME
- 9.What is the ring-shaped ligament that holds the footplate of the stapes in the oval window?
- A.
Axial ligament
- B.
Tensor tympani
- C.
Annular ligament
- D.
Stapedius
- 10.What do the axial ligaments do?
- A.
Hold the footplate of the stapes
- B.
Pulls malleus medially and anteriorly, tensing the TM
- C.
Suspends the ossicles in the tympanic cavity
- D.
Pulls stapes in a posterior direction
- 11.The passageway leading from the nasopharynx to the anterior wall of the ME is
- 12.The Eustachian tube is usually
- 13.What are the functions of the middle ear?
- A.
Amplification, Protection, Impedance matching
- B.
Protection, Impedance matching, Pressure Equalization
- C.
Protection, Localization, Impedance matching
- 14.How many decibels does the ME compensate for?
- 15.The area difference btwn the TM and footplate of the stapes is...
- A.
17:1
- B.
13:1
- C.
20:1
- D.
30:1
- 16.The ratio of the lever action of the ossicular chain is
- 17.Higher mass equals
- A.
Higher frequency
- B.
Lower frequency
- 18.Higher stiffness equals
- A.
Higher frequency
- B.
Lower frequency
- 19.If fluid builds up in the ear, what happens?
- 20.How does the ME protect?
- 21.The acoustic reflex can reduce how many decibels of loud sounds?
- A.
70-80
- B.
50-60
- C.
10-30
- D.
20-40
- 22.What is the structure comprising of the sensory organs for hearing and balance?
- A.
Tympanic membrane
- B.
Middle ear
- C.
Inner ear
- 23.What is the auditory portion of the inner ear?
- 24.The base of the cochlea deals with...
- A.
High frequencies
- B.
Low frequencies
- 25.What is the membrane covered opening in the labyrinthine wall of the ME space, leading in the scala tympani?
- A.
Oval window
- B.
Round window
- C.
Scala media
- 26.The opening in the labyrinthine wall of the ME space, leading into the scala vestibuli of the cochlea, into which the footplate of the stapes fits is
- 27.Which is filled with endolymph?
- A.
Scala vestibuli
- B.
Scala tympani
- C.
Scala media
- 28.Perilymph is not only similar to CSF, but also...
- A.
High in potassium
- B.
High in sodium
- 29.The base of the basilar membrane is for
- A.
High frequencies
- B.
Low frequencies
- 30.How many rows of outer hair cells are there? Totally in what?
- A.
5 or 6, totaling in 12,000
- B.
3 or 4, totaling in 13,000
- C.
3 or 4, totaling in 12,000
- D.
5 or 6, totaling in 3,500
- E.
3 or 4, totaling in 3,500
- 31.What are cell bodies of the auditory nerve fibers that innervate the inner and outer hair cells clustered in the modiolus?
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