Ear

Question 1

What are the 3 parts that makes up the ear

Answer 1

External ear
Middle ear
Inner ear

Question 2

External ear consist of

Answer 2

Pinna

The external auditory canal

Question 3

Pinner
Description
Function

Answer 3

Cartilage covered in skin on either side of the head
FUNCTION
It direct sound waves into the external auditory canal

Question 4

External auditory canal
Description
Function

Answer 4

Curved tube that approximately 25 mm long
FUNCTION
transmits sound waves from pinna to tympanic membrane

Question 5

The middle ear consists of

Answer 5

Typmpanic membrane 
Ossicles
Ovul window 
Round window 
Opening of Eustachian tube

Question 5

The middle ear consists of

Answer 5

Typmpanic membrane 
Ossicles
Ovul window 
Round window 
Opening of Eustachian tube

Question 6

Tympanic membrane
Description
Function

Answer 6

It’s a thin membrane that covers the opening between the external auditory canal and the middle ear
FUNCTION
concert sound waves into vibrations that are transmitted to the malleus the first ear ossical

Question 7

What are the 3 ossicals

Answer 7

Malleus
Incus
Stapes

Question 8

Ossicals
Description
Function

Answer 8

Malleus, incus and stapes

•The ossicles are joined together by tiny ligaments that articulat with each other
•one end of the malleus attaches to the tympanic membrane and the other to the incus which articulate with the stapes
•stapes attaches to the ovul window
•form a lever that connects the outter ear with the inner ear
FUNCTION
Amplifies and transmits vibrations to the ovul window

Question 9

Ovul window
Description
Function

Answer 9

•Opening is covered by a thin membrane that connects the middle ear with the inner ear
•the area of the ovul window is smaller thn that of the tympanic membrane
FUNCTION
transmit vibrations from the air filled middle ear to the fluid filled inner ear

Question 10

Round window
Description
Function

Answer 10

The opening between the middle ear and inner ear that is situated below the ovul window
Covered by a thin membrane

FUNCTION
absorb pressure waves from the perilymph

Question 11

Eustachian Tube
Description
Function

Answer 11

Connects he middle ear to the pharynx
FUNCTION
to equalizer pressur on both sides of the tympanic membrane

Question 12

Inner ear divided into your

Answer 12

Vestibular apparatus

Cochlea

Question 13

Which one is which for hearing and balance

Answer 13

Vestibular apparatus is for balance

Cochlea is for hearing

Question 14

Bony labyrinth

Answer 14

Series of canal and cavity in the temporal labyrinth filled with perilymph fluid

Question 15

Membraneous labyrinth

Answer 15

Membraneous tube and sac filled with endolymph that floats in the perilymph of bony labyrinth

Question 16

Role of semi circular canal in maintaining balance

Answer 16

• A change in speed or direction of movement
• Stimulats the cristae
• Stimuli is converted into an impulse
• Impulse is transmitted to the cerebellum via the auditory nerve
• Cerebellum send impulse to the muscles to restore balance

Question 17

How increas of production in mucus can cause the tympanic membrane to burst

Answer 17

• Mucus blocks opening of Eustachian tube
• causing pressure in middle ear
• pushing on the tympanic membrane

Question 18

What willhappen if ossicles do not function

Answer 18

• The ossicles will not be able to vibrate
• therefore vibrations will not be passed to the inner ear
• Cochlea will not be stimulated so no amplification

Question 19

What will lead to hearing loss in an older person

Answer 19

• The ovul window will not vibrate freely
• therefore the cochlea will not recieve any vibrations
• no pressure waves will form in cochlea
• therefore the organ of corti will not be stimulated
• fewer or no impulse sent to the cerebrum

Question 20

Maculae

Function

Answer 20

Reacts to gravity by detecting position of your head

Question 21

Cristae

Function

Answer 21

Detects the speed and movement of head