hearing

Question 1

wavelength = ?

Answer 1

C/f

Question 2

the middle ear ossicles transmit how much of the sound energy?

Answer 2

60%

Question 3

without the ossicle, the middle ear can only transmit how much of the sound energy?

Answer 3

2%

Question 4

a sound of how many dB induces contraction of the middle ear muscles?

Answer 4

60-80 dB

Question 5

what is the delay of contraction of the middle ear muscles?

Answer 5

50-100 ms

Question 6

what does the contraction of the middle ear muscles do to protect the ear?

Answer 6

reduces the transmission of low frequencies

Question 7

hammer = ?

Answer 7

malleus

Question 8

anvil = ?

Answer 8

incus

Question 9

stirrup = ?

Answer 9

stapes

Question 10

what fills the middle ear?

Answer 10

air

Question 11

the middle ear attaches to the inner ear at what window?

Answer 11

the middle window

Question 12

what are the characteristics of the basilar membrane at the base?

Answer 12

narrow and stiff

Question 13

what are the characteristics of the basilar membrane at the apex?

Answer 13

wide and floppy

Question 14

does the scala vestibuli have an epithelial border?

Answer 14

no

Question 15

what secretes K+ into the scala media?

Answer 15

stria vascularis

Question 16

what part of the cochlea is the organ of corti in?

Answer 16

scala media

Question 17

what are the outer hairs cells for?

Answer 17

amplification

Question 18

what is the gelatinous mass that guides the movements of the hair bundles in response to swings of the basilar membrane?

Answer 18

tectorial membrane

Question 19

what are the inner hair cells for?

Answer 19

(hearing) stimulation alters the rate of release of the NT glutamate

Question 20

what fibrous membrane converts the propagated longitudinal sound waves into a standing transversal wave and performs frequency analysis?

Answer 20

basilar membrane

Question 21

prestin contracting =

Answer 21

depolarization, shortening, basilar membrane stretches, amplification

Question 22

prestin expanding =

Answer 22

hyperpolerization, inhibitory, enlongating, basilar membrane is down

Question 23

what parts of the cochlea are filled with perilymph?

Answer 23

scala vestibuli and scala tympani

Question 24

what part of the cochlea is filled with endolymph?

Answer 24

scala media

Question 25

innervation and central auditory processes order

Answer 25

1. spiral ganglion (cochlear nerve) 2. cochlear nucleus 3. superior olive 4. lateral lemniscus 5. inferior colliculus 6. thalamus 7. auditory cortex