Hearing

Question 1

What do sound waves bounce off to form neural signals?

Answer 1

Tympanic membrane

Question 2

What is the normal conversation dB?

Answer 2

60

Question 3

What is the loudest tolerable sound for humans in dB?

Answer 3

120

Question 4

What part of the ear funnels sound to the tympanic membrane?

Answer 4

Outer ear- ear pinna + canal

Question 5

What part of the ear is an air-filled cavity connected to the nasopharynx by the Eustachian tube?

Answer 5

Middle

Question 6

What is made of these 3 ossicles? Malleus, incus, stapes

Answer 6

Middle ear

Question 7

What and how many are attached to the malleus and the stapes, which work together in order to regulate vibrations?

Answer 7

2 small skeletal muscles

Question 8

What are the name of the 2 skeletal muscles which aid in the regulation of vibrations?

Answer 8

Stapedius and Tensor tympani muscles

Question 9

Which motor nucleus is involved with the tensor tympani muscle?

Answer 9

5

Question 10

Which motor nucleus is involved with the stapedius muscle?

Answer 10

7 (VII)

Question 11

What type of nucleus is involved with the cochlear nerve?

Answer 11

Cochlear nuclei

Question 12

What do scala- vestibule and tympani contain?

Answer 12

Perilymph

Question 13

What does scala media contain?

Answer 13

Endolymph

Question 14

What is the functional unit of the semicircular organ?

Answer 14

Organ of Corti

Question 15

Where is the organ of Corti located atop of?

Answer 15

The basilar membrane

Question 16

What is atop the organ of Corti?

Answer 16

Tectorial membrane

Question 17

What is the 1st step of hearing:

Answer 17

Sounds waves are collected by outer ear and produce vibrations on the tympani membrane

Question 18

What is the 2nd step of hearing:

Answer 18

Movements of ossicles in the middle ear

Question 19

What is the 3rd step of hearing:

Answer 19

Vibrations on the oval window are transferred to basilar membrane causing it to move up and down

Question 20

What is the 4th step of hearing:

Answer 20

Hair cells cilia shear along the tectorial membrane causing changes in transmitter release

Question 21

Does increased frequency sound create waves closer or farther away from the oval window?

Answer 21

Closer to oval window

Question 22

What does the movement of one cilia, which results in all of them moving in the same direction, result in?

Answer 22

Depolarization

Question 23

What activates sensory neurons?

Answer 23

Glutamate

Question 24

What 2 things go into the synaptic vesicle?

Answer 24

Calcium and potassium

Question 25

Where is the auditory cortex located?

Answer 25

Temporal lobes

Question 26

Where does the crossing over of fibers occur, where sensory fibers from the left go over to the right?

Answer 26

Trapezoid body