Special Senses: The Ear

Question 1

Describe External ear

Answer 1

Called Puma/ auricle also

Funnels sound waves into auditory canal which ends in the tympanic membrane

Cells that produce ear wax

Question 2

Describe Middle ear

Answer 2

Air filled chamber containing the ossicles, malleus, incus and stapes that passes sound vibrations to the oval window/ amplifies info

Question 3

Eustachian/ auditory tube

Answer 3

Equalises pressure in the middle ear

Question 4

Inner ear

Answer 4

Consist of vestibulocochlear tube that transmit sound from inner ear to brain

Question 5

Where does hearing occur?

Answer 5

In the cochlea

Question 6

Describe right inner ear

Answer 6

Bony labyrinth found here: filled with fluid called perilympth in cochlea

Glycoprotein mass means head position can be detected hear because of semi-circular canals

Question 7

The Scalas location

Answer 7

Scala vestibule: ends at oval window

Scales tympani: ends at round window

Question 8

Function of stapes

Answer 8

Causes oval window to vibrate as sound passes through scalas to the round window

Sound vibration causes endolympth in cochlear duct to vibrate

Question 9

Function of orgi

Answer 9

Transduction if auditory signals into nerve impulses action potentials

Question 10

Semicircular canals

Answer 10

Three fluid filled tubes in inner ear that helps with balance when head moves about

Fluid moves hair in each canal