PSYC 230 UIUC Exam 2 UPDATED
ACTUAL Questions and CORRECT
Answers
Sound stimulus - CORRECT ANSWER -the periodic variations in air pressure traveling
out from the source
pure tones - CORRECT ANSWER -A sound wave in which changes in air pressure follow
a sine wave pattern.
Loud sounds can be dangerous - CORRECT ANSWER -Prolonged contact to sounds over
85 dB can eventually cause hearing loss. Sounds louder than 120 dB are painful. Sounds louder
than 130 dB will generally result in immediate and permanent hearing loss.
Hearing range of humans - CORRECT ANSWER -20-20,000 Hz.
Outer ear - CORRECT ANSWER -Pinna, external auditory canal, tympanic membrane
(eardrum)
Pinna - CORRECT ANSWER -Collects and funnels sound to auditory canal and amplifies
frequencies
External auditory canal - CORRECT ANSWER -conducts sound from pinna to tympanic
membrane.
Tympanic membrane (eardrum) - CORRECT ANSWER -Thin elastic sheet.
Middle ear - CORRECT ANSWER -Eustachian tube
Tensor tympani
,Stapedius
Ossicles:
Malleus (hammer)
Incus (anvil)
Stapes (stirrup)
Eustachian tube - CORRECT ANSWER -Connects the middle ear with the pharynx and
Equalizes air pressure in eardrum
tensor tympani and stapedius - CORRECT ANSWER -Muscles attached to the malleus;
tensing the tensor tympani decreases vibration
Ossicles - CORRECT ANSWER -3 small bones in the middle ear that conduct and
amplify sounds (Malleus, Incus, Stapes)
Incus (anvil) - CORRECT ANSWER -Receives from Malleus and sends to Stapes
Malleus (hammer) - CORRECT ANSWER -Receives from tympanic membrane and sends
to incus
Stapes (stirrups) - CORRECT ANSWER -Transmits to oval window in middle ear
Inner ear - CORRECT ANSWER -Turns sound waves into neural signal
Cochlea - CORRECT ANSWER -snail shaped structure that houses hair cells
Canals in the Cochlea - CORRECT ANSWER -Vestibular, Middle, Tympanic
, Reissner's membrane - CORRECT ANSWER -A thin sheath of tissue separating vestibular
and middle canals
Basilar membrane - CORRECT ANSWER -Organ of corti lies on top of, and contains
complex cells
Tectorial membrane - CORRECT ANSWER -gelatinous flap that rests above hair cells
Organ of corti - CORRECT ANSWER -a structure on the basilar membrane that houses
hair cells
Hair cells - CORRECT ANSWER -hairs that transduce the basilar membrane into neural
signals
Stereocilia - CORRECT ANSWER -hairlike extensions on the tips of hair cells
Inner hair cells - CORRECT ANSWER -Conveys info to the brain
Outer hair cells - CORRECT ANSWER -Releases info from the brain
Small amplitude sounds - CORRECT ANSWER --Small displacements along the cochlea,
-Tectorial membrane will shear across the organ of corti less forcefully
-hair cells bend to a smaller degree.
Large amplitude sounds - CORRECT ANSWER --Large displacements along the cochlea.
-Tectorial membrane will shear across the organ of corti more forcefully
-hair cells will bend to a large degree.
ACTUAL Questions and CORRECT
Answers
Sound stimulus - CORRECT ANSWER -the periodic variations in air pressure traveling
out from the source
pure tones - CORRECT ANSWER -A sound wave in which changes in air pressure follow
a sine wave pattern.
Loud sounds can be dangerous - CORRECT ANSWER -Prolonged contact to sounds over
85 dB can eventually cause hearing loss. Sounds louder than 120 dB are painful. Sounds louder
than 130 dB will generally result in immediate and permanent hearing loss.
Hearing range of humans - CORRECT ANSWER -20-20,000 Hz.
Outer ear - CORRECT ANSWER -Pinna, external auditory canal, tympanic membrane
(eardrum)
Pinna - CORRECT ANSWER -Collects and funnels sound to auditory canal and amplifies
frequencies
External auditory canal - CORRECT ANSWER -conducts sound from pinna to tympanic
membrane.
Tympanic membrane (eardrum) - CORRECT ANSWER -Thin elastic sheet.
Middle ear - CORRECT ANSWER -Eustachian tube
Tensor tympani
,Stapedius
Ossicles:
Malleus (hammer)
Incus (anvil)
Stapes (stirrup)
Eustachian tube - CORRECT ANSWER -Connects the middle ear with the pharynx and
Equalizes air pressure in eardrum
tensor tympani and stapedius - CORRECT ANSWER -Muscles attached to the malleus;
tensing the tensor tympani decreases vibration
Ossicles - CORRECT ANSWER -3 small bones in the middle ear that conduct and
amplify sounds (Malleus, Incus, Stapes)
Incus (anvil) - CORRECT ANSWER -Receives from Malleus and sends to Stapes
Malleus (hammer) - CORRECT ANSWER -Receives from tympanic membrane and sends
to incus
Stapes (stirrups) - CORRECT ANSWER -Transmits to oval window in middle ear
Inner ear - CORRECT ANSWER -Turns sound waves into neural signal
Cochlea - CORRECT ANSWER -snail shaped structure that houses hair cells
Canals in the Cochlea - CORRECT ANSWER -Vestibular, Middle, Tympanic
, Reissner's membrane - CORRECT ANSWER -A thin sheath of tissue separating vestibular
and middle canals
Basilar membrane - CORRECT ANSWER -Organ of corti lies on top of, and contains
complex cells
Tectorial membrane - CORRECT ANSWER -gelatinous flap that rests above hair cells
Organ of corti - CORRECT ANSWER -a structure on the basilar membrane that houses
hair cells
Hair cells - CORRECT ANSWER -hairs that transduce the basilar membrane into neural
signals
Stereocilia - CORRECT ANSWER -hairlike extensions on the tips of hair cells
Inner hair cells - CORRECT ANSWER -Conveys info to the brain
Outer hair cells - CORRECT ANSWER -Releases info from the brain
Small amplitude sounds - CORRECT ANSWER --Small displacements along the cochlea,
-Tectorial membrane will shear across the organ of corti less forcefully
-hair cells bend to a smaller degree.
Large amplitude sounds - CORRECT ANSWER --Large displacements along the cochlea.
-Tectorial membrane will shear across the organ of corti more forcefully
-hair cells will bend to a large degree.
