Hearing

Question 1

Pinna

Answer 1

Part of the outer ear and collects sounds waves

Question 2

Auditory canal

Answer 2

Part of the outer ear and collects sound waves

Question 3

Tympanic membrane

Answer 3

This is the eardrum and it conducts sound waves to the ossicles through vibrations

Question 4

Ossicles

Answer 4

Set of three small bones that amplify sound and conduct the vibrations to the oval window (cochlea region)

Question 5

Eustachian tube

Answer 5

Equalizes pressure on both sides of the tympanic membrane

Question 6

Organ of Corti

Answer 6

Located in the central canal of the cochlea with a lower and upper membrane with hairs on the lower membrane that are receptor cells

Question 7

Basilar membrane

Answer 7

Located in the cochlea and its movement causes hair cells to bend, which causes depolarization of the membrane

Question 8

Conductive hearing loss

Answer 8

Hearing loss due to the outer and middle ear failing to conduct vibrations to the cochlea. This can be corrected by a hearing aid which amplifies sound before it enters the ear

Question 9

Nerve deafness

Answer 9

Caused by defects in the sensory cells in the cochlea, auditory nerve, brain, inherited disease, or infection. A cochlear implant can provide correction by stimulating the auditory nerves with electrical impulses.

Question 10

Utricle and Saccule

Answer 10

Responsible for balance and equilibrium, and contain endolymph, sensory hair cells, and otoliths. Respond to movements of the head.

Question 11

Semicircular canals

Answer 11

Detects three-dimensional movements because the flow of endolymph causes hair cells to bend, which generates an action potential and impulses are sent to the cerebellum

Question 12

What are the two mechanoreceptors in the inner ear?

Answer 12

Utricle & Saccule and the semi-circular canals