hair cells function/hearing function

Question 1

hair cells inner row responsible for

Answer 1

hearing

Question 2

hair cells outer row responsible for

Answer 2

keeping tension on the basilar membrane

Question 3

hair bundle

Answer 3

sterocillia of inner hair row

Question 4

tip link

Answer 4

attaches tip of each hair bundle through sterocilia to tip of next taller hair cell

Question 5

when sterocillia bend they

Answer 5

open K+ channels

Question 6

cochlear nerve fibers join the

Answer 6

vetibular nerve

Question 7

vestibulocholear nerve path

Answer 7

transverse the internal acoustic meatus and enters the cranial cavity

Question 8

volume/loudness

Answer 8

function of wave amplitude

Question 9

pitch

Answer 9

function of wave frequency

Question 10

timbre

Answer 10

resonance quality or overtone of sounds

Question 11

sound attenuation reflex

Answer 11

tensor tympani muscle and stapieus medius muscle dampens sounds

Question 12

hearing pathway

Answer 12

sound waves–>external auditory canal–> tympanic membrane vibrates–>auditory ossicles vibrate–>oval window–> scala vestibuli–>perilymph–> vestibular membrane–> vibration in endolympph of cochlea duct –> basilar membrane displaced detected by hair cells–> hair cells bend—> vibrations go out from scala tympani to round window

Question 13

CNS hearing pathway through inferior colliculi

Answer 13

sensory axons from cochlear ganglion–>cochlear nucleus in brainstem–>infeiror colliculous–>thalamus–>auditory cortex

Question 14

CNS hearing pathway through supeiror olivary nuclei

Answer 14

sensory axons from cochlear ganglion–> superiors olivary nuclei–> inferior colilcui —> back to inner ear or motor nuclei–>efferent fibers in middle ear