Ear - general

Question 1

list parts of outer ear

Answer 1

• auricle/pinna
• external auditory canal/meatus
• tympanic membrane

Question 2

purpose of TYMPANIC MEMBRANE

Answer 2

vibrates

Question 3

the external auditory canal houses what

Answer 3

ceruminous glands

Question 4

aka: pinna

Answer 4

auricle

Question 5

purpose of PINNA

Answer 5

direct soundwaves into ear

Question 6

what makes up the middle ear

Answer 6

ossicles

Question 7

define OSSICLES

Answer 7

amplify sound waves & transmit to inner ear

Question 8

what are the 3 ossicles

Answer 8

malleus/hammer, incus/anvil, stapes/stirrup

Question 9

define EUSTACHIAN TUBE

Answer 9

connects middle ear w/pharynx

Question 10

purpose of EUSTACHIAN TUBE

Answer 10

allow pressure to equalize on both sides of eardrum & is continuous mucus membrane from pharynx to middle ear cavity

Question 11

list parts of inner ear

Answer 11

• vestibule
• semicircular canal/labyrinth
• cochlea/spiral organ

Question 12

purpose of VESTIBULE

Answer 12

maintains equilibrium

Question 13

purpose of SEMICIRCULAR CANAL

Answer 13

sense head motion & balance

Question 14

purpose of COCHLEA

Answer 14

transmit sound to auditory nerve

Question 15

aka: cochlea

Answer 15

spiral organ

Question 16

aka: semicircular canals

Answer 16

labyrinth

Question 17

give the steps of hearing

Answer 17

1. sound waves enter meatus
2. tympanic membrane vibrates
3. ossicles amplify & transmit vibrations across middle ear
4. stapes send vibration to inner ear
5. vibrations move hair cells of cochlea
6. movement causes nerve impulse
7. impulse sent to brain & temporal lobe translates