Chapter 6 Part 3

Question 1

Fluid filled space

Answer 1

Labyrinth

Question 2

Acts as a device to transform acoustic/mechanical energy (sound) into electrochemical energy

Answer 2

Inner ear

Question 3

vestibule communicates with the _____

Answer 3

Cochlea

Question 4

What is part of the vestibular portion of the inner ear?

Answer 4

Vestibule and semicircular canals

Question 5

concerning the position and movement of the body (balance)

Answer 5

Vestibular portion

Question 6

Portion of the inner ear concerned about hearing

Answer 6

Auditory portion

Question 7

What does the auditory portion of the inner ear include?

Answer 7

Cochlea

Question 8

How many canals does the cochlea have?

Answer 8

3

Question 9

extends from the oval window in the vestibule to the helicotrema (small opening in the apex of the cochlea). Part of bony labyrinth. Filled with perilymph.

Answer 9

Scala vestibuli

Question 10

extends from the round window in the vestibule to the helicotrema. Part of bony labyrinth. Placement of CI electrodes. Filled with perilymph.

Answer 10

Scala tympani

Question 11

the central duct is also referred to as the cochlear duct. Part of the membranous labyrinth. Filled with endolymph. Bound by 2 thin membranes.

Answer 11

Scala media

Question 12

separates scala media from scala vestibuli.

Answer 12

Reissner’s membrane

Question 13

separates scala media from scala tympani.

Answer 13

Basilar membrane

Question 14

Ligament support for the scala media

Answer 14

Spiral ligament

Question 15

Produces endolymph & supplies 
oxygen & other nutrients 
to the cochlea

Answer 15

Stria vascularis

Question 16

Organ of hearing

Answer 16

Organ of corti

Question 17

Where is the organ of corti housed in?

Answer 17

Scala media

Question 18

small hairlike projections on the ends of each of the hair cells (inner and outer).

Answer 18

Stereocilia

Question 19

Low frequencies: maximum displacement near the _____ turn

Answer 19

Apical

Question 20

High frequencies: maximum displacement near the ____ turn

Answer 20

Basal

Question 21

transmits nerve impulses from inner ear to brainstem.

Answer 21

Acoustic nerve (VIII)

Question 22

What 2 types of nerves are part of the VIII nerve?

Answer 22

Cochlear and vestibular

Question 23

How many turns does the cochlea have?

Answer 23

3

Question 24

What are the 3 turns in the cochlea?

Answer 24

Basal, middle, apical

Question 25

What type of liquid is in the scala vestibuli and scala tympani?

Answer 25

Perilymph

Question 26

What type of liquid is in the scala media?

Answer 26

Endolymph

Question 27

How many rows of inner hair cells do we have?

Answer 27

1

Question 28

How many rows of outer hair cells do we have?

Answer 28

3-4

Question 29

High frequency is detected in the ____ of the cochlea

Answer 29

Base

Question 30

Low frequency is detected in the _____ of the cochlea

Answer 30

Apex

Question 31

What is tonotopic maps/organizations?

Answer 31

Low frequencies: maximum displacement near the apical turn | High frequencies: maximum displacement near the basal turn

Question 32

What makes up the VIII cranial nerve?

Answer 32

Vestibular nerve + cochlear nerve