4.3 quiz

How does the loss of frequency selectivity affect hearing?

It makes sounds appear muffled and unclear

It improves frequency discrimination

It increases the dynamic range of hearing

It enhances the ability to hear in noisy environments

It improves the ability to hear soft sounds

It makes sounds appear muffled and unclear

Why is turning up the volume not always effective for improving hearing in individuals with damaged outer hair cells?

It improves the dynamic range of hearing

It increases the production of endolymph

It does not restore frequency selectivity

It enhances motion along the basilar membrane

It transduces sound information to the brain

It does not restore frequency selectivity

What is a cochlear dead region?

An area where outer hair cells are missing

A region of the cochlea that does not receive blood supply

A part of the cochlea that is only responsive to low frequencies

An area where inner hair cells are absent, resulting in no hearing sensitivity

An area with excessive endolymph production

An area where inner hair cells are absent, resulting in no hearing sensitivity

How do outer hair cells contribute to the dynamic range of hearing?

By supplying blood to the cochlear duct

By transducing high-frequency sounds

By amplifying low-level sounds more than high-level sounds

By increasing the dynamic range to match inner hair cells

By detecting sound intensity

By amplifying low-level sounds more than high-level sounds

What happens to the auditory signal when outer hair cells are damaged? (Select 2 or More)

Enhanced motion along the basilar membrane

Increased sensitivity to high-frequency sounds

Reduction in frequency selectivity

Loss of amplification of low-level sounds

Improved speech understanding

Reduction in frequency selectivity

Loss of amplification of low-level sounds

What is the main function of the stria vascularis in the cochlea?

Providing structural support to hair cells

Supplying potassium-rich endolymph to the cochlear duct

Enhancing motion along the basilar membrane

Transducing sound information to the brain

Sending signals directly to the auditory nerve

Supplying potassium-rich endolymph to the cochlear duct

What structural feature of the cochlea is responsible for supplying blood and nutrients to the inner ear?

Basilar membrane

Tectorial membrane

Stria vascularis

Reissner's membrane

Spiral ganglion

Stria vascularis