Ear

Question 1

What structures make up the external ear?

Answer 1

Auricle (pinna)
External acoustic meatus
Tympanic membrane

Question 2

Function of the auricle?

Answer 2

Collects and directs sound waves

Question 2

Function of external acoustic meatus?

Answer 2

Conducts sound to tympanic membrane

Question 3

What is the tympanic membrane?

Answer 3

Eardrum — vibrates in response to so

Question 4

What is the function of the ossicles?

Answer 4

Amplify and transmit sound vibrations

Question 4

What are the 3 auditory ossicles?

Answer 4

Malleus
Incus
Stapes

Question 5

What is the middle ear?

Answer 5

Air-filled cavity containing auditory ossicles

Question 6

Which ossicle is attached to the tympanic membrane?

Answer 6

Malleus

Question 7

Which ossicle connects to the oval window?

Answer 7

Stapes

Question 8

What is the oval window?

Answer 8

Transmits vibrations to inner ear

Question 9

What is the round window?

Answer 9

Relieves pressure in inner ear

Question 10

What are the two middle ear muscles?

Answer 10

Tensor tympani
Stapedius

Question 11

Function of these muscles?

Answer 11

Protect ear from loud sounds

Question 12

What are the 3 main regions of the inner ear?

Answer 12

Vestibule
Semicircular canals
Cochlea

Question 12

Function of vestibule?

Answer 12

Detects head position (static equillibrium)

Question 12

What are the two parts of the inner ear?

Answer 12

Bony labyrinth
Membranous labyrinth

Question 13

What is the function of the auditory (Eustachian) tube?

Answer 13

Equalizes pressure between middle ear and atmosphere

Question 13

What structures are in the vestibule?

Answer 13

Utricle and saccule

Question 14

What do semicircular canals detect?

Answer 14

head movement (dynamic equilibrium)

Question 14

What is the ampulla?

Answer 14

Enlarged region detecting rotation

Question 15

What is the function of the cochlea?

Answer 15

Hearing

Question 16

What are the two fluids in inner ear?

Answer 16

Perilymph
Endolymph

Question 16

What structure inside cochlea detects sound?

Answer 16

Spiral organ (organ of Corti)

Question 17

What are the 3 cochlear chambers?

Answer 17

Scala vestibuli
Cochlear duct
Scala tympani

Question 18

External ear function?

Answer 18

Collect sound

Question 18

hat is the pathway of sound?

Answer 18

Auricle → external acoustic meatus → tympanic membrane → ossicles → oval window → cochlea

Question 18

What nerve carries hearing and balance signals?

Answer 18

Vestibulocochlear nerve (CN VIII)

Question 19

What happens if ossicles are damaged?

Answer 19

Conductive hearing loss

Question 19

What happens if cochlea is damaged?

Answer 19

Sensorineural hearing loss

Question 20

Middle ear function?

Answer 20

amplify sound

Question 21

inner ear function?

Answer 21

hearing + balance

Question 22

hearing structure?

Answer 22

cochlea