PPT 11 continued and PPT 12 physiology of hearing

Question 1

connects the middle ear to the nasopharynx and equalizes pressure

Answer 1

Eustachian tube

Question 2

involuntary muscle contraction in the middle ear

Answer 2

acoustic reflex

Question 3

occurs in response to high-intensity sounds

Answer 3

acoustic reflex

Question 4

decreases the amount of energy transferred to cochlea

Answer 4

acoustic reflex

Question 5

origin- posterior wall of middle ear insertion-stapes

Answer 5

stapedius

Question 6

stiffens ossicular chain to reduce vibration

Answer 6

stapedius

Question 7

contains a system of interconnecting tunnels called labyrinths

Answer 7

inner ear

Question 8

rigid, bony wall of inner ear- cavities in bone

Answer 8

bony labyrinth

Question 9

collection of fluid-filled tubes

Answer 9

membranous labyrinth

Question 10

same general shape as bony labyrinth but buffered from bones with perilymph

Answer 10

membranous labyrinth

Question 11

makes sure there is no friction between the bony labyrinth and membranous labyrinth

Answer 11

perilymph

Question 12

list the two primary structures of the inner ear

Answer 12

semicircular cancels, cochlea

Question 13

where does mechanical energy is convert to electrical impulses

Answer 13

inner ear

Question 14

what is the primary structure of hearing

Answer 14

cochlea

Question 15

set of 3 tubes in the inner ears

Answer 15

semicircular canals

Question 16

has a primary function of vestibular system

Answer 16

semicircular canals

Question 17

spiral-shaped cavity in inner ear

Answer 17

cochlea

Question 18

list the three chambers of the cochlea

Answer 18

scala vestiboli, scala tympani, scala media

Question 19

the sensory organ of hearing

Answer 19

organ of corti

Question 20

also known as vestibular duct, contains perilymph, conducts sound vibrations to cochlear duct

Answer 20

scala vestibuli

Question 21

also known as the tympanic duct, separated from cochlear duct by basilar membrane, contains perilymph

Answer 21

scala tympani

Question 22

also known as cochlear duct, contains endolymph, contains organ of corti

Answer 22

scala media

Question 23

negatively charged fluid, increased sodium

Answer 23

perilymph

Question 24

positively charged fluid, increased potassium

Answer 24

endolymph