Hearing

Question 1

Often considered the most important sense for umans, what allows us to communicae with sounds

Answer 1

hearing

Question 2

Does our hearing system bnd different sounds?

Answer 2

NO, as the visual system does when two different wavelenghts of lght are mixed to produce color

Question 3

What are the sound waves are collected by

Answer 3

the pinna and external auditory canal and funneled o the tympanic membrane to make it vibrate

Question 4

Attatched to the tymanic membrane, what transmitsthe vibration to the incus (anvil)

Answer 4

malleus

Question 5

The Anvil passes the vibration on to the stapes whcih does what?

Answer 5

The stapes pushes on the oval window which separate the air filled middle ear form the fluid inner ear to produce pressure waves in the snail shaped cochea of the inner ear

Question 6

Dufferent lengths of frequencies allow us to hear

Answer 6

different pitches

Question 7

Hari cells in the cochlea ridng on the basilar membrane, have hair bundles of

Answer 7

microscopic hairlik stereocillia that are deflected bythe overlying tectorial membrane

Question 8

What do the Hair cells convert the

Answer 8

mechanical vibration to na electrical signa,tehy excite the 30,000 fibers of the auditory nerve that carry the signals to the brainstem

Question 9

Because each hair cell rides on a different part of thebasilar membrane, and is each best excited by

Answer 9

a different frequency and so each nerve fiber carries information about a differnt.

Question 10

Auditory information is analyzed by multiple brain centers as it flows to the

Answer 10

temporal gyrus or auditory cortex

Question 11

In the auditory cortex the part of the brain involved in

Answer 11

perceiving sound

Question 12

IN the auditory cortex, adjacent neurons tend to respond to tones of similar frquency BUt, the specialize

Answer 12

in differnt tones