Deck 31: Hearing

Question 1

Sound waves of a single frequency are called

A) Timbres
B) Tones
C) Pitch
D) Octaves
E) Inte rva ls

Answer 1

B

Question 2

The fluids in the scala vestibuli and scala tympani are connected at the

A) Cochlea
B) Modiolus
C) Ve stib ule
D) Round window
E) Helicotrema

Answer 2

E

Question 3

The fluids in the scalar vestibuli and sca la tym pani are

A) Endolymph, high in Na and low in K
B) Perilymph, high in Na and low in K
C) Endolymph, low in Na and high in K
D) Perilymph, low in Na and high in K
E) Plasma, high in Na and low in K

Answer 3

B

Question 4

Increasing the intensity of a sound by 10 decibels means that

A) The intensity is Increased by a factor of 10 and the pressure by a factor of 100
B) The intensity is Increased by a factor of 100 and the pressure by a factor of 10
C) The intensity is Increased by a factor of 10 and the pressure by a factor of 3.16
D) The intensity is Increased by a factor of 3.16 and the pressure by a factor of 10
E) Cann ot be determ ined without a reference intensity or pressure

Question 5

The three ossicles are located in the

A) Outer ear
B) Au ric le
C) Eustachian tube
D) Middle ear
E) Cerebrum

Question 6

Stereocilia are not true cilia in that they

A) Ar e m otile
B) La ck th e "9 + 2" a rran ge m en t of m icro tub ules in th e cilia
C) Are covered by the cell mem brane
D) Are longer
E) Are electrically active

Question 7

Equalization of pressure on the two sides of the tympanic mem brane is achieved by the

A) Cochlea
B) Ceruminous glands
C) Eustachian tube
D) Stapedius
E) Tensor tympani

Question 8

Ascent to altitude or desc ent from altitude is often accom panied by periods of reduced hearing sen sitivity, crack ling so und s an d retu rn to n orm al sen sitivity. This is d ue to

A) Swelling of the cochlear fluid with reduce d external pressu re
B) Movem ent of the oval window as the cochlea unwinds
C) Bulging of the round window with reduced externa l pressure
D) Movement of the tym pan ic m em bran e w ith un equ al pres sure between the middle ear and outer ear
E) Different states of contractions of the stapedius muscle and tensor tympani

Question 9

The correspondence of the frequency of sound to the nervous response at specific locations on the cochlea is called

A) Frequency domains
B) Fourier representation
C) Tonotopic mapping
E) Isotonic modulation
F) Frequency representation

Question 10

D am ag e to Br oc a's are a re su lts in

A) R ec ep tive ap ha sia
B) Ex pre ssiv e ap ha sia
C) Neglect syndromes
D) Parkinsonism
E) Vertigo

Question 11

The outer ear consists of the

A) Tympanic mem brane and the ossicles
B) Pinna and the ear canal
C) Cochlea
D) Vestibular apparatus and the cochlea
E) External auditory meatus

Question 12

Higher frequency sounds are detected

A) By inner hair cells near the base of the cochlea
B) By outer hair cells near the base of the cochlea
C) By inner hair cells near the apex of the cochlea
D) By inner hair cells near the modiolus in the middle of the cochlea
E) By outer hair cells near the apex of the cochlea

Question 13

D am ag e to W er nic ke 's a re a re su lts in

A) Re cep tive aph asia
B) Ex pr es siv e a ph as ia
C) Neglect syndromes
D) Parkinsonism
E) Vertigo

Question 14

The fluid in th e s ca la m ed ia is

A) Endolymph, high in Na and low in K
B) Perilymph, high in Na and low in K
C) Endolymph, low in Na and high in K
D) Perilymph, low in Na and high in K
E) Plasma, high in Na and low in K

Question 15

The intensity of a sound is proportional to the

A) Pressu re
B) Square root of the pressure
C) Log of the pressure
D) Squ are o f the p ressu re
E) Phase of the pressure

Question 16

The area of the oval window is about what fraction of the area of the tympanic mem brane?

A) About 20%
B) About 10%
C) About 6%
D) About 2 %
E) About 1%

Question 17

Inn er ha ir ce lls

A) Ha ve m an y m ore affe ren t fibe rs an d fe w er eff eren t fibe rs th an ou ter h air ce lls
B) Form a triple spiral line from the base of the cochlea to the helicotrema
C) Ar e fu rth er fro m the m od iolu s th an the ou ter ha ir ce lls
D) Have stereocilia imm ersed in perilymph
E) Have tip links connected to Na+ ch an ne ls

Question 18

The fun ction o f the o uter e ar in hu m ans is to

A) Focus sound into the middle ear
B) Enable finding the direction of a sound
C) Trap foreign material in earwax
D) Equalize pressure on the two sides of the eardrum
E) Both A and C are correct

Question 19

The fun ction o f the m iddle e ar is to

A) Convert air pressure waves to water pressure waves
B) Convert high frequency sound waves to lower fequency waves
C) Am plify the pressure presented to the oval window
D) Am plify the pressure presented to the round window
E) Both A and C are correct

Question 20

Broca's area is located in the

A) Frontal lobe immed iately opposite the primary auditory cortex
B) Parietal lobe in the post-central gyrus
C) Posterior temporal lobe adjacent to the occipital lobe
D) Primary auditory cortex
E) Anterior temporal lobe