Ears: Cochlea And Hearing

Question 1

The outer ear consists of what structures?

Answer 1

-pinna and external auditory meatus

Question 2

What are the ossicles of the middle ear? (3)

Answer 2

-Malleus, incus, stapes

Question 3

Vibration of the __________ produces compression waves in the fluid filled cochlea of the inner ear

Answer 3

-oval window

Question 4

The compression waves of cochlear fluid flow through a thin, flexible membrane within the cochlea called the ___________

Answer 4

-basilar membrane

Question 5

The basilar membrane is coated with ___________, that are displaced upward

Answer 5

-hair cells

Question 6

How is pitch determined?

Answer 6

-location of the stimulated hair cells on the basilar membrane and of a specific loudness, coded by frequency of action potentials

Question 7

What is an example of conduction deafness?

Answer 7

-damage to the ossicles in the otitis media

Question 8

In conduction deafness, what is better, air or bone conduction?

Answer 8

-bone conduction (via mastoid process)

Question 9

What is Rinnes test?

Answer 9

-tests air (via ear) and bone (via mastoid process) conduction using a tuning fork

Question 10

What is webers test?

Answer 10

-placing a tuning form on the midsaggittal line of the head

Question 11

During the webers test with a patient with conduction deafness, the sound will seem louder in which ear?

Answer 11

-affected ear

Question 12

During the webers test with a patient with sensory deafness, the sound will seem louder in which ear?

Answer 12

-the cochlea is defective and the sound will be louder in the normal ear