Lecture 3: Outer, Middle and Inner Ear

Question 1

What are the functions of the outer ear?

Answer 1

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Question 2

What helps the outer ear achieve its function?

Answer 2

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Question 3

How does the shape help accommodate function?

Answer 3

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Question 4

What experiment was done on the outer ear?

Answer 4

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Question 5

What is the main function of the middle ear?

Answer 5

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Question 6

How does the middle ear carry out its function?

Answer 6

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Question 7

How did the middle ear develop in organisms? Why?

Answer 7

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Question 8

What are hair cells?

Answer 8

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Question 9

How are hair cells organised?

Answer 9

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Question 10

What are Tip Links?

Answer 10

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Question 11

11. What is the organ of Corti? What are the cellular structure?

Answer 11

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Question 12

What is the structure of the cochlear? What is it filled with?

Answer 12

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Question 13

What are the two windows? What are their properties?

Answer 13

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Question 14

What is special about the basilar membrane? What properties?

Answer 14

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Question 15

How does the inner ear work? What happens?

Answer 15

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Question 16

Where are the different frequencies along the membrane? Why? What properties?

Answer 16

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Question 17

What is needed to make the signals? What does this? How?

Answer 17

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Question 18

Why is it that the travelling wave only peaks at a certain point in the basilar membrane?

Answer 18

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Question 19

Why must the ear be active? How did this problem develop through time?

Answer 19

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Question 20

Why is the fact that the inner ear is filled with liquid a problem?

Answer 20

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Question 21

What is resonance theory of hearing?

Answer 21

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Question 22

What was the problem with resonance theory that was found? What was the “solution” to this to solve the problem?

Answer 22

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Question 23

What is Regenerative amplification?

Answer 23

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Question 24

What was the experiment done that gave evidence that the ear was active? What does the ear produce?

Answer 24

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Question 25

Why does the ear produce sounds?

Answer 25

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Question 26

How is the travelling wave different in an alive and dead person?

Answer 26

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Question 27

What are the four characteristics of the ear's active process?

Answer 27

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Question 28

How are the frequency vs vibration amplitude graphs different in dead and alive?

Answer 28

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Question 29

What happens to these graphs/ lines when the sound is amplified in the dead and alive?

Answer 29

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Question 30

What happens to alive curve when play sounds of different amplitudes?

Answer 30

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Question 31

What is the graph showing how sounds are coming from the ear? What is the name for this?

Answer 31

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Question 32

What is the outer hair cell electromotility? What changes are seen in the out hair cell? Why?

Answer 32

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