inner ear

Question 1

the inner ear is filled with

Answer 1

fluid

Question 2

vestibular division

Answer 2

responsible for balance

Question 3

hearing division

Answer 3

contains cochlea (cochlea is narrower at apex and wider at the base), info related to sound

Question 4

osseous spiral lamina

Answer 4

inside bony cochlea, structure that is series of shlves where the membranous structure sits and provides support

Question 5

modiolus

Answer 5

central core (pillar) of spiral lamina, houses auditory nerve fibers in cochlea

Question 6

heilocortema

Answer 6

scala vestibuli and the scala tympani meet at the apex of the cochlea

Question 7

endolymph

Answer 7

boney shell of cochlea filled with an interior membranous labyrinth sac of fluid
has high K+ concentration

Question 8

perilymph

Answer 8

seperates bony and membranous cochlea, has high Na+ concentration

Question 9

Reissner’s membrane

Answer 9

in cochlea, membrane between the scala vestibuli and the scala media

Question 10

basilar membrane

Answer 10

in cochlea, membrane between the scala tympani and the scala media
Narrow at the base and Wider at the apex
moves like a wave when sound pressure enters the cochlea and displaces the perilymph
the base is more responsive to high frequencies

Question 11

location of organ of corti

Answer 11

in cochlea and sits on top of basilar membrane.

Question 12

inner hair cells organ of corti

Answer 12

one row

Question 13

outer hair cells organ of corti

Answer 13

3 rows

Question 14

tectorial membrane

Answer 14

in organ of corti, gel like and capable of bonding hair cells

Question 15

stereocilia

Answer 15

3 rows, arranged from tallest to shortest, On the top of each hair cell is a set of mechanoreceptors

Question 16

tip link

Answer 16

stereocilia between rows are connected by tip links, which are important for converting pressure waves into an electrical signal
can regenerate in humans, but if you repeatedly damage them they might not

Question 17

Von Betsky basilar membrane discovery

Answer 17

basilar membrane moves like a wave when stimulated by sound

electrically stimulating the basilar membrane of a cadaver that the basilar membrane would move

Question 18

tonotopy

Answer 18

the mapping of place to frequency

Question 19

traveling wave

Answer 19

wave reaches a peak amplitude that then rapidly falls. The amplitude of the wave is therefore greatest at a particular location on the membrane.
Wave amplitude decreases and becomes extinct at a particular distance along the basilar membrane.

Question 20

frequency analysis

Answer 20

Complex sound is decomposed into its constituent frequency by the cochlea

Question 21

mechanotransduction

Answer 21

When stereocilia are bent, K+ enters the channel and depolarizes the cell, leading to an influx of Ca+ resulting in the release of neurotransmitters and the excitation of the afferent nerve fiber at the base of the hair cell.

Question 22

prestin

Answer 22

protein in outer hair cells that causes the outer hair cells to grow in length , responsible for dancing hair cell, provides a spring action! Adds energy into the system.
responsible for the active amplification that occurs in the inner ear

Question 23

Otoacoustic Emissions

Answer 23

measure cochlear health

Question 24

tuning curve

Answer 24

A narrower range of the cochlea is activated , suggestive of sharper tuning (i.e., better sensitivity to frequencies).

Question 25

another name for ear wax

Answer 25

cerumen