Hearing

Question 1

What is the outer ear composed of?

Answer 1

Oracle (concentrate sound waves)
External auditory meatus (hollow tube)

Question 2

What is the middle ear composed of?

Answer 2

Small and 3 bones:
Malleus, incus, stapes
Tympanic membrane

Question 3

What is the inner ear composed of?

Answer 3

Cochlear (contains receptors)
Scala vestibuli
Scala media
Scala tympani
Basilar membrane

Question 4

Scala vestibuli

Answer 4

Filled with perilymph and connects at its large end to the oval window

Question 5

Scala media

Answer 5

Filled with endolymph

Question 6

Scala Tympani

Answer 6

Filled with perilymph and connects at its large end to the round window

Question 7

Transduction

Answer 7

Inward movement of tympanic membrane
1. Pushed by compression phase of a sound wave
2. Vibrates the malleus, incus and stapes
3. Push on the oval window
4 Push the perilymph towards the inner ear

Question 8

Upward bowing of the basilar membrane is _______

Answer 8

compression

Question 9

Downward bowing of basilar membrane is _______

Answer 9

refraction

Question 10

Conduction deafnes

Answer 10

Able to hear but muffled
Outer ear is filled with water and fluid

Question 11

Nerve deafness

Answer 11

Nerve and auditory pathway is affected
Complete deafness
Congenital deafness
Drugs: ototoxic