The Ear

Question 1

List all the parts of the ear

Answer 1

Pinna
Auditory Canal
Ear Drum
Ossicles
Eustachian Tube
Vestibule
Semicircular Canals
Cochlea

Question 2

How does the ear process sound

Answer 2

Stimulus—-Recipient—-Transformer—-Conductor—Analyser

Question 3

what does the pinna do

Answer 3

it captures sound and is part of the outer ear

Question 4

describe the auditory canal

Answer 4

It is part of the outer ear and it carries sound to the ear drum. It
secretes cerebum (wax) to protect the ear drum from small insects, bacteria and dust.

Question 5

what is the ear drum

Answer 5

Part of the middle ear, it is a sensitive tissue that vibrates when stimulated by
a sound wave.

Question 6

where does the ear drum transmit vibrations

Answer 6

ossicles.

Question 7

what are the smallest bones in the body

Answer 7

ossicles

Question 8

what do the ossicles do

Answer 8

transmit vibrations from the ear drum to
the inner ear.

Question 9

what’s the role of the eustachian tube

Answer 9

this channel is used to balance out the air
pressure on either side of the ear drum so that the ear drum can vibrate properly.

Question 10

what is the vestibule

Answer 10

It is the entrance to the cochlea and contains nerve cells that detect body
position and are sensitive to gravity.

Question 11

what do the nerve cells in the vestibule do

Answer 11

The cells produce nerve impulses that are sent to the cerebellum to help keep our bodies balanced.

Question 12

what are the semicircular canals

Answer 12

They are three rings filled with fluid and each oriented along a
different axis (x, y and z). When movement takes place, the information on the body’s orientation (balance) is captured by receptor cells that react to the motion of the liquid inside the canals. This information travels through the vestibular nerve to the cerebellum for interpretation.

Question 13

what is the transformer of the ear

Answer 13

cochlea

Question 14

what does the cochlea do and how

Answer 14

it transforms vibrations into nerve
impulses. The vibrations are passed along from the stirrup to the fluid inside the cochlea. Tiny hairs in the cochlea (cilia) are stimulated by the vibrations. Each hair reacts to its own frequency to determine pitch and more hairs are stimulated as a sound gets louder. Vibrations are transformed into nerve impulses that are sent through the auditory nerve and to the brain for analysis.

Question 15

give a rundown!

Answer 15

Vibrations→ear canal→eardrum→ossicles→vestibule→cochlea⚡nerve impulses→auditory nerve→brain→processing