Learn: Audiology Quiz #2

The tops of the hair cells and supporting cells come together to form a solid surface called the

reticular lamina

what activates the acoustic reflex in humans

loud sounds of any frequency

which of the following is "flask-shaped" allowing for approximately 20 nerve fibers to connect to this cell body

inner hair cells

the apical end of the cochlea where the scala vestibuli and scala tympani meet is called the

helicotrema

the organ of corti is located on the

basilar membrane

contain structural proteins which allow them to change in length

outer hair cells

Like all organs, the organ of corti serves a specific function. The primary function of the organ of corti is to:

change mechanical vibrations associated with sounds that occur within the cochlea into neural signals representing sound

the coding frequency to a specific place along the basilar membrane is called

tonotopic organization

at the base of the cochlea, the basilar membrane is ____ and ____ than at the apex

narrower, stiffer

two membranes within the cochlea result in three distinct scala or fluid filled compartments

high frequencies are coded at the ____ of the cochlea

base

low frequencies are coded at the ____ of the cochlea

apex

which portion of the tympanic membrane is only made up of 2 layers

pars flaccida

which muscle is associated with the acoustic reflex in humans

stapedius

the bony core of the cochlea is called the

modiolus

the force applied to the tympanic membrane is focused down to the oval window. this mechanism is the largest contribution to the middle ear transformer

area ratio mechanism

the manubrium of malleus is longer than the long process of the incus

ossicular lever mechanism

there is greater displacement in the unattached regions of the tympanic membrane than at the manubrium

curved membrane mechanism

the stapes is:

small (cute, and an important part of our hearing system)

the tectorial membrane is a gelatinous stricture that lies over the top of the hair cells. what is embedded in the tectorial membrane even when there is no sound?

stereocilia of outer hair cells

mechanical vibrations are transduced into neural signals by the:

inner hair cells

the order sound travels through the middle ear (lateral --> medial):

tympanic membrane (lateral) --> malleus --> incus --> stapes --> inner ear (medial)

which part of the middle ear is superior to the tympanic membrane and contains portions of the incus and malleus

epitympanic recess

As a pure tone sound travels through the cochlea, it will peak in amplitude at a point along the basilar membrane that is associated with:

the ideal stiffness for the frequency