Hearing & Ear

Question 1

3 major parts of the ear

Answer 1

1. outer ear
2. middle ear
3. inner ear

Question 2

The outer and middle are ONLY for

Answer 2

hearing

Question 3

The inner ear is for

Answer 3

hearing and balance

Question 4

The inner is the MOST

Answer 4

complex

Question 5

Structures of the outer ear:

Answer 5

1. Auricle (pinna)
2. External auditory meatus (ear canal)
3. Tympanic membrane

Question 6

Auricle (pinna)

Answer 6

collects sound waves

Question 7

External auditory meatus

Answer 7

guides sound wave to tympanic membrane

Question 8

Tympanic membrane

Answer 8

Seperates external canal and middle ear AND vibrates when sound hits it

Question 9

Parts of the Pinna (auricle)

Answer 9

shell- shaped flap that collects sound waves and channels them into the helix (the rim)+ the lobe

Question 10

Parts of the auditory canal

Answer 10

a curved tube that extends fro the auricle to the eardrum (2.5 cm long). Lined with cerumen and ceuminous glands

Question 11

Cerumen

Answer 11

earwax, which traps the foreign bodies and repels bugs

Question 12

Parts of the Tympanic Membrane (eardrum)

Answer 12

separates the outer ear from the middle ear. somewhat cone shaped and is about 17.5 mm in diameter. vibrates in response to sound pressure waves

Question 13

The visible part of the ear is called the

Answer 13

pinna

Question 14

3 bones of the middle ear

Answer 14

1. hammer/malleus
2. anvil/incus
3. stirrup/stapes

Question 15

Tympanic Membrane is the boundary between the

Answer 15

outer and middle ear

Question 16

The middle ear is an air filled cavity in which bone?

Answer 16

temporal bone

Question 17

Ear ossicles

Answer 17

1. malleus
2. incus
3. stapes

Question 18

Eustachian tube

Answer 18

1. connects middle ear to throat

2. equalizes pressure on eardrum

Question 19

Oval Window

Answer 19

separates middle ear from inner ear

Question 20

What helps to equalize the pressure and open esustachian tubes?

Answer 20

swallowing and yawning

Question 21

The muscles of the middle ear

Answer 21

1. Tensor Tympani

2. Stapedius

Question 22

Tensor Tympani

Answer 22

when this muscle contracts, the handle of the malleus is pulled inward producing tension on the tympanic membrane (reducing movement)

Question 23

Stapedius

Answer 23

acts in opposition to the tensor tympani, pulls on the stapes

Question 24

The boundary between the middle and inner ear is called the

Answer 24

oval window

Question 25

The inner ear is a cavity called the what?

Answer 25

bony labyrinth

Question 26

Perilymph

Answer 26

is the fluid between the bone and membrane

Question 27

Endolymph

Answer 27

is the fluid within the membranes

Question 28

The inner ear is composed of:

Answer 28

1. cochlea
2. vestibule
3. semicircular ducts (canals)