Chapter 5: Human Ear

Question 1

Why are Ears important?

Answer 1

For hearing and for maintaining our sense of balance.

Question 2

What are the sections of the Ear?

Answer 2

The outer ear, the middle ear and inner ear.

Question 3

What is the medical term for the fleshy outer ear?

Answer 3

The auricle or pinna.

Question 4

The Auricle or Pinna is made up of?

Answer 4

Cartilage and skin.

Question 5

What does the Pinna do?

Answer 5

Captures sound waves and transmits them into the external auditory canal.

Question 6

What does the ear canal do?

Answer 6

Transmits wave sounds to the tympanic membrane (eardrum).

Question 7

Where is the Tympanic membrane (eardrum) located?

Answer 7

Between the outer ear and middle ear.

Question 8

What happens when sound waves strike the Tympanic membrane?

Answer 8

The membrane vibrates and transmits the vibrations further in, to the bones of the middle ear.

Question 9

What are called the many glans that contains the skin lined with the ear canal?

Answer 9

Ceruminous glands, that secrete cerumen.

Question 10

What does Cerumen combines with?

Answer 10

With dead skin cells to form earwax.

Question 11

What does Earwax do?

Answer 11

Coats the ear canal to moisturize it, fight off infection and keep dust, dirt and other debris from entering the middle ear.

Question 12

Where are the three smallest bone of the body found?

Answer 12

In the middle ear.

Question 13

What are the name of the 3 smallest bone?

Answer 13

Malleus. Incus and Stapes

Question 14

What is another name of Malleus?

Answer 14

Hammer.

Question 15

What is another name of Incus?

Answer 15

Anvil.

Question 16

What is another name of Stapes?

Answer 16

Stirrup.

Question 17

What is the medical term for all of the 3 smallest bones in the body together?

Answer 17

The auditory ossicles.

Question 18

What is the role of the Auditory ossicles?

Answer 18

To transmit the sound waves from the eardrum to the inner ear by vibrations.

Question 19

What is the Eustachian tube?

Answer 19

Is the canal that connects the middle ear to the nasopharynx.

Question 20

What does the Eustachian tube consist of?

Answer 20

Of the upper throat and the back of the nasal cavity.

Question 21

What does the Eustachian controls?

Answer 21

The air pressure within the middle ear, making it equal with the air pressure outside the body.

Question 22

What does the inner ear contains?

Answer 22

The sensory receptors for hearing and balance.

Question 23

What are the basics receptors for hearing and balance?

Answer 23

Sensory cells, called hair cells.

Question 24

What is the Oval Window?

Answer 24

The membrane that separates the middle ear from the inner ear.

Question 25

Where does the vibrations enter the inner ear?

Answer 25

Through the Oval Window.

Question 26

The Cochlea is shaped like a snail, what contains?

Answer 26

The spiral organ of Corti.

Question 27

What is the Spiral Organ of Corti?

Answer 27

The receptor organ for hearing.

Question 28

What does the Spiral Organ of Corti consist of?

Answer 28

Of tiny hair cells that translate the fluid vibration of sound.

Question 29

Where does the Spiral Organ of Corti translate vibration of sound from?

Answer 29

From its surrounding ducts into electrical impulses that are carried to the brain by sensory nerves.

Question 30

The Semicircular Canals are lined with hair cells and filled with a liquid substance known as?

Answer 30

Endolymph.

Question 31

Every time the head moves, what moves the hair cells?

Answer 31

The Endolymph.

Question 32

What does the movements of the hair cells provide?

Answer 32

Information about orientation to the brain to help maintain balance.

Question 33

What is coming from the inner ear and running to the brain?

Answer 33

Is the eighth cranial nerve-the acoustic or auditory nerve.

Question 34

What does the Auditory Nerve carries to the brain?

Answer 34

Balance and hearing information.