Auditory System

Question 1

Basilar Membrane:

The base of the basilar membrane is more ———- & ——?

Answer 1

Narrow and stiff

Question 2

Basilar Membrane:

T or F: At the basilar membrane the base has a higher frequency of wave

Answer 2

True

Question 3

Basilar Membrane:

At the apex its more —- & ——?

Answer 3

Wide and Floppy

Question 4

Basilar Membrane:

Where is there low frequency in the basilar membrane?

Answer 4

In the apex because it is thicker

Question 5

Basilar Membrane:

What is Tonotopy?

Answer 5

Tonotopy is the map of sounds in the ear which happens at the basilar membrane

Question 6

Anatomy of Cocclea:

What part of the cochlea sits on the basilar membrane?

Answer 6

Organ of Corti

Question 7

Anatomy of cochlea:

What is the fluid called that is found in the scala vestibuli and scala tympani?

Answer 7

Perilymph

Question 8

Anatomy of cochlea:

What is the fluid foind the scala media called?

Answer 8

Endolymph

Question 9

anatomy of cochlea:

What moves in order to hear?

Answer 9

Basiliar Membrane

Question 10

When the cilia moves there’s a push in tectorial membrane, what movement causes a depolarization in the hair cell?

Answer 10

Back and Fourth

Question 11

If the movement of the cilia is going in the opposite direction what happens to the hair cell?

Answer 11

A opposite direction of hair cells means there’s a hyperpolarization

Question 12

Hair Cells:

When there’s damage in the hair cells you may experience culmative effect of aging of hearing what is this called?

Answer 12

Presbycusis

Question 13

Which two physical characteristics of basilar membrane underlie the tonotopy on this membrane?

Answer 13

1. Stiffness
2. Width