Histology - Neuro Auditory

B. Elastic

What kind of cartilage comprises the auricle?

A. Hyaline

B. Elastic

C. Fibrocartilage

C. Tensor tympani and Stapedius

The Middle Ear consist of a narrow, irregular air-filled chamber in the temporal bone, 3 tiny auditory ossicles and?

A. Parotid gland

B. Tympanic membrane

C. Tensor tympani and Stapedius

A. radial, circular

The middle layer of the tympanic membrane consist of collagen fiber that has an outer _______ and inner _______?

A. radial, circular

B. circular, radial

C. longitudinal, circular

A. Eustachian tube

Which structure connects the tympanic membrane to the nasopharynx?

A. Eustachian tube

B. Tympanic cavity

C. External acoustic meatus

d. Utricle and Saccule

What are the two sacs of the membranous labyrinth within the vestibule?

a. Anterior and Posterior Chamber

b. Hair Cells and Supporting Cells

c. Inner and External Ear

d. Utricle and Saccule

c. Simple cuboidal; maculae

The lining epithelium of the two sacs is ________ except for a small region in both structures, called ______?

a. Simple cuboidal; utriculosaccular duct

b. Simple stratified; stereocilia

c. Simple cuboidal; maculae

d. columnar epithelium; sterocilia

b. Utricle

It is an irregularly-shaped pouch that occupies the posterosuperior region of the vestibule.

a. Maculae

b. Utricle

c. Saccule

d. Utriculosaccular duct

Vestibule

Identify the specimen.

b. Triangular

The macula of the utricle is somewhat _______ in surface view and is about 2.8 mm long and 2.2 mm wide.

a. Circular / round

b. Triangular

c. Spherical

d. Irregular

d. Stereocilia

The apical surfaces of some of the epithelial cells in the macula are provided with what?

a. Microvilli

b. Hair cells

c. Supporting cells

d. Stereocilia

c. Columnar epithelium

Macula consists of what lining epithelium that is supported by connective tissue?

a. Simple stratified

b. Keratinized epithelium

c. Columnar epithelium

d. Non-keratinized epithelium

a. Transmitting neural signals to the brain

Which of the following is a primary function of hair cells in the inner ear?

a. Transmitting neural signals to the brain

b. Providing structural support to the cochlea

c. Regulating the production of earwax

d. Maintaining the balance of endolymph fluida. Transmitting neural signals to the brain

b. Provide nutrients and structural support to hair cells

Supporting cells in the inner ear are known to:

a. Directly detect sound vibrations

b. Provide nutrients and structural support to hair cells

c. Generate electrical impulses in response to sound

d. Act as primary auditory receptors

c. Inner ear

In which part of the ear are hair cells and supporting cells primarily located?

a. Outer ear

b. Middle ear

c. Inner ear

d. Tympanic membrane

Semicircular Canal

Identify the structure labeled as A.

Perilymph space

Identify the structure labeled as B.

Cupola

Identify the structure labeled as C.

Crista Ampullaris

Identify the structure labeled as D.

Endolymph

Identify the structure labeled as E.

Membranous Labyrinth

Identify the structure labeled as F.

a. Anterior, Posterior, Lateral

Enumerate the 3 semicircular canals.

a. Anterior, Posterior, Lateral

b. Anterior, Posterior, Medial

c. Superior, Inferior, Lateral

d. Superior, Inferior, Medial

D Crista Ampullaris

What is the elongated structure that arises from the wall of the duct that is in the ampulla of the canal?

A Semicircular Canal

B Perilymph space

C Cupola

D Crista Ampullaris

a. Cuboidal cells, supporting cells and sensory (hair) cells

The epithelium of semicircular ducts is made up of _________ and is consisted of ______ and _______ ?

a. Cuboidal cells, supporting cells and sensory (hair) cells

b. Columnar cells, supporting cells and satellite (hair) cells

c. Cuboidal cells, supporting cells and satellite (hair) cells columnar cells, supporting cells and sensory (hair) cells

Cochlear Canal

Identify the specimen.

B. Stratified cuboidal with capillaries

What is the lining epithelium of Stria Vascularis?

A. Stratified cuboidal with goblet cells

B. Stratified cuboidal with capillaries

C. Stratified cuboidal with stereocilia

C. Marginal cells

This type fo cell in the Stria Vascularis is involved in potassium transport and lines the endolymphatic spaces of scala media.

A. Basal cells

B. Intermediate Pigment Containing cells

C. Marginal cells

Cochlea

Identify the specimen.

B. Modiolus

The Cochlea turns 2 1/2 to 2 3/4 around what piece of bone?

A. Malleus

B. Modiolus

C. Stapes

A. Vestibule; blindly

The base of the Cochlea is continous with the _________, while the apex ends ____________.

A. Vestibule; blindly

B. Helicotrema; anteriorly

C. Modiolus; superiorly

Modiolus

Identify the specimen.

C. Spiral ganglion and Efferent fibers of inhibitory neurons

The Modiolus contains the following structures

A. Reissner’s membrane and perilymph

B. Stria Vascularis and afferent nerve fibers

C. Spiral ganglion and Efferent fibers of inhibitory neurons

Scala Vestibuli

Identify the structure labeled as A.

Scala Media

Identify the structure labeled as B.

Vestibular Membrane (Reissner’s Membrane)

Identify the structure labeled as C.

Scala Tympani

Identify the structure labeled as D.

Osseous Spiral Lamina

Identify the structure labeled as E.

Cochlear Nerve

Identify the structure labeled as F.

Osseous Labyrinth

Identify the structure labeled as G.

Modiolus

Identify the structure labeled as H.

Organ of Corti

Identify the structure labeled as I.

Spiral Ganglion

Identify the structure labeled as J.

Afferent Nerve Fibers

Identify the structure labeled as K.

A. Reissner’s membrane

This membrane divides the Scala vestibuli and Scala Media as seen in the slide

A. Reissner’s membrane

B. Scala Tympani

C. Basilar membrane

D. Crista Ampullaris

B. Scala Media

Which compartment of the Cochlea is filled with endolymph

A. Scala Tympani

B. Scala Media

C. Scala Vestibuli

Scala Vestibuli

Identify the structure labeled as A.

Vestibular Membrane (Reissner’s Membrane)

Identify the structure labeled as B.

Scala Media

Identify the structure labeled as C.

Stria Vascularis

Identify the structure labeled as D.

Scala Tympani

Identify the structure labeled as E.

Spiral Ganglion

Identify the structure labeled as F.

a. Scala media

#1 separates the scala vestibuli from the __?

a. Scala media

b. Stria vestibuli

c. Scala tympani

Vestibular membrane

Identify the structure labeled as 1.

B. Tectorial

Glycoprotein membrane located on top of hair cells in the organ of Corti:

A. Otolithic

B. Tectorial

C. Cupula

Tectorial Membrane

Identify the structure labeled as A.

Inner Hair Cells

Identify the structure labeled as B.

Inner Phalangeal Cells

Identify the structure labeled as C.

Outer Pillar Cells

Identify the structure labeled as D.

Outer Phalangeal Cells

Identify the structure labeled as E.

Outer Hair Cells

Identify the structure labeled as F.

C. #3

Which of the following labelled structures contain receptors for the sense of hearing?

A. #1

B. #2

C. #3

D. #5

Vestibular Membrane

Identify the structure labeled as 1.

Stria Vascularis

Identify the structure labeled as 2.

Cochlear Duct (Scala Media)

Identify the structure labeled as 3.

Internal Spiral Tunnel

Identify the structure labeled as 4.

Tectorial Membrane

Identify the structure labeled as 5.

Outer/Inner Tunnels

Identify the structure labeled as 6.

Cochlear Nerve

Identify the structure labeled as 7.