Hearing Science Final - Quiz #9 Inner Ear
The active process results in nonlinear cochlear responses, which include (mark all that apply)...
ALL ANSWERS CORRECT - the generation of distortion products. - compression - suppression -a change in the bandwidth of cochlear filters as a function of sound intensity.
The basilar membrane is thickest in which part of the cochlea?
Apex
The basilar membrane vibrates optimally for high-frequency sounds in which specific location?
Base of the cochlea
What is the name of the membrane upon which the organ of Corti sits?
Basilar membrane
All of the following are support cells except:
Boettcher's cells Claudius' cells Hensen's cells ANSWER: Outer hair cells
Where does the scala vestibuli join the scala tympani?
Helicotrema
Which of the following are sensory cells?
Inner hair cells
In vivo measurements of the basilar membrane (i.e., measurements in living animals) are limited to studying a small patch of the basilar membrane while systematically varying the frequency of the stimulus to observe the all portions of the traveling wave (i.e., basal portion, peak portion and apical portion).
True
The resting potential between the endolymph in the scala media perilymph in the scala vestibuli and scala tympani is called the ____________________.
endocochlear potential
Openings in the spiral lamina through which nerve fibers pass are called ____________________.
habenula perforata
Cochlear compression is...
the shallow, non-linear growth of basilar membrane displacement at mid-to-high stimulus intensities.
___________________ is the fluid in the scala media.
Endolymph
Which of these is the sense organ of hearing?
Organ of Corti
Which of the following are sense organs found in the inner ear?
Organ of Corti Cristae ampullares Maculae ANSWER: All of the choices are correct.
Which type of cells have an electromotility function?
Outer hair cells
The organs of hearing and balance are located in which portion of the temporal bone?
Petrous
What is the name of the protein in the wall of the outer hair cell that is believed to be responsible for its motility function?
Prestin
What is the name of the upper surface of the organ of Corti?
Reticular lamina
Which of the following is a direct current potential?
Summating potential
Which statement best describes the active process in cochlear mechanics?
The active process results in amplification of the traveling wave by the motility of the outer hair cells.
What two differences will be observed when comparing the cochlear response in a live animal, with that of a cadaver?
The live animal will exhibit high sensitivity to soft sounds and narrow cochlear filters, while the cadaver will not.
The function of the basilar membrane is analogous to _________________.
a bank of band-pass filters
The function of the stria vascularis is analogous to __________ ?
a battery
Shearing the stereocilia of inner and outer hair cells results in all of the following except...
an abrupt reduction in basilar membrane displacement
Cochlear hearing loss is characterized by all of the following except...
increased sensitivity to low intensity sounds due to outer hair cell motility
The osseous structure in the center of the cochlea is called the _________________.
modiolus
The scala vestibuli is separated from the scala media by the ____________________ membrane.
reissner
The correspondence between the frequency of a sound and the place along the cochlea that is stimulated is called ____________________.
tonotopicity
