Final Exam Study Guide - Part 1 of 3

Question 1

Handicap

Answer 1

The possible adverse impact associate with auditory impairment and disability. “Participation Restriction”

Question 2

The _______________ lies on top of the basilar membrane, is comprised of sensory reception organs/hair cells for hearing.

Answer 2

Organ of Corti

Question 3

The 8th CN exits the bony labyrinth via the _________

Answer 3

Internal auditory meautus

Question 4

The Basilar membrane

Answer 4

• separates the scala media from the scala tympani.
• extends almost the entire length of the cochlea and supports the organ of Corti.
• floor of cochlear duct.

Question 5

The ___________ is responsible for transduction of sound pressure variation to electrochemical/neural impulses..

Answer 5

The inner ear (inner hair cells)

Question 6

The scala tympani terminates laterally near the ME cavity at the _______ window.

Answer 6

Round.

Question 7

The Central Auditory nervous system begins at the ________

Answer 7

brainstem

Question 8

The sensory receptor cells for hearing are located in the _______.

Answer 8

Scala Media

Question 9

The basilar membrane is ________ at the base than the apex.

Answer 9

narrower and stiffer

Question 10

Inner hair cells:

Answer 10

• 1 row
• pear shaped
• u shaped sterocilia
• primary transducer of mech. to EC. energy.

Question 11

The ____________ is a small opening allowing passage for perilymph from the scala vestibuli to the scala tympani.

Answer 11

Helicotrema

Question 12

The sterocilia of the outer hair cells are imbedded in the underside of the _________________.

Answer 12

Tectorial membrane.

Question 13

The tympanic membrane is held in position at the end of the external auditory canal by a ring of tissue called the _________.

Answer 13

Tympanic annulus

Question 14

The middle ear muscle that contracts in order to reduce the amplitude of vibration of a sound and which is innervated by a branch of the 8th CN (Facial) is the ______ muscle.

Answer 14

Stapedius

Question 15

The portion of tympanic membrane which contains only two layers, the epidermal/lateral and mucous membrane/medial layers is called the __________

Answer 15

Pars flaccida

Question 16

The _________ forms most of the Tympanic Membrane.

Answer 16

pars tensa

Question 17

Fluid in the membranous labyrinth is called_________.

Answer 17

Endolymph

Question 18

___________ lines the outer wall of the cochlear duct and is responsible for manufacturing endolymph.

Answer 18

stria vascularis

Question 19

Air pressure to mechanical pressure is:

Answer 19

Transmission

Question 20

_________ refers to abnormal or reduced function.

Answer 20

Hearing impairment.

Question 21

Pathology

Answer 21

The disorder of an organ, such as the inner ear.

Question 22

The mode of function in the inner ear includes

Answer 22

mechanical
hydrodynamics
electrochemical action.

Question 23

The center point of the eardrum where it attaches to the malleus and forms the tip of a conical shape is called ________.

Answer 23

Umbo

Question 24

The 25dB “recapture” of sound energy that is lost as it is transmitted from air to fluid is attributed to the middle ear system’s _________.

Answer 24

areal ratio

Question 25

The ______ is the central core of bone around which the cochlea turns for 2 3/4 turns.

Answer 25

modiolus

Question 26

The roof of the cochlear duct is formed by _________

Answer 26

Reissner’s membrane

Question 27

____________ is made up by a collection of cell bodies for the first order auditory neuron and occupy space within the modiolus.

Answer 27

spiral ganglion

Question 28

The tensor tympani muscle is innervated by a branch of the _____ and contracts in order to reduce the amplitude of vibration of a loud sound.

Answer 28

trigeminal nerve (CN5)

Question 29

_________ frequency sounds cause stimulation of hair cells in the apical turn of the cochlea.

Answer 29

Low