Journey to the Sound of the Brain Flashcards
trumpet makes ___ waves in the air
sound
what kind of mechanical wave is sound waves
longitudinal
part of the ear that catches sound waves
outer ear
after the outer ear has catched the waves, it travels through a narrow passageway called
ear canal
end of the ear canal there is an
eardrum
membrane roughly half size of a dime
ear drum
ear drum is roughly half the size of a ___
dime
sound waves make the eardrum ___
vibrate
the eardrum vibrates three tiny bones called
malleus
incus
stapes
bones that amplify, increase the sound vibrations
malleus
incus
stapes
shaped like a snail and the size of a garden pea
cochlea
shape of cochlea
snail
size of cochlea
garden pea
a spiral-shaped organ in the inner ear that is responsible for hearing
chochlea
cochlea is filled with ___ in which the sound vibrations makes this ripple
fluid
rippling of fluid creates ___
waves
hair-like structures in the cochlea
stereocilia
stereocilia sits on top of ___
hair cells
stereocilia are grouped together as ___ inside the cochlea
hair cell bundles
the hair bundle on top of the hair cell turn the movement of the waves into____
electrical signals
as the hair bundles are moved, ___ rush into the top of the hair cells
ions
as the hair bundles are moved, ions rush into the top of the hair cells causing the release of the chemicals into the ___ of the hair cells
bottom
the chemicals then bind to the ___ nerve cells and create an electrical signal
auditory
the chemicals then bind to the auditory nerve cells and create an electrical signal which travels along the ____ nerve
auditory nerve
the chemicals then bind to the ___ nerve cells and create an electrical signal which travels along the auditory nerve to the ___
brain
diffrent hair cells respond to different ___ of sound
frequencies
the hair cells at the ___ of the cochlea detect higher pitched sounds
base
the hair cells at the base of the cochlea detect higher pitched sounds such as a __ or __
piccolo
flute
the hair cells at the ___ of the spiral of cochlea detect progressively lower pitched sounds
toward the top
hair cells towars the top of the spiral detects what kind of instrument sound
trumpet
trombone
top of the spiral of cochlea
apex
at the apex of the cochlea, it detects the -____ pitch sound
lowest
example of lowest pitch sound instrument
tuba
interprets the messages as sounds that we recognize nad understand
brain
a small, hammer-shaped bone in the middle ear that plays a key role in hearing
malleus
s a small, anvil-shaped bone in the middle ear that transmits sound vibrations from the eardrum to the inner ear:
incus
a small stirrup-shaped bone in the middle ear, transmitting vibrations from the incus to the inner ear.
stapes
