Development And Histology Of The Ear (Msq Drill 272)

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  • 1/103 Questions

    Where do the middle and external ear develop from?

    • Posterior medulla
    • Rostral medulla
    • Pharyngeal area
    • Notochord
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  • 2. 

    Most of the fibers in cranial nerve 8 are

    • Motor

    • Sensory

    Correct Answer
    A. Sensory
  • 3. 

    How many semicircular canals are there?

    • 2

    • 3

    • 4

    • 5

    Correct Answer
    A. 3
    Explanation
    superior, posterior and lateral

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  • 4. 

    The rest of the ear is filled with

    • Endolymph

    • Perilymph

    • CSF

    Correct Answer
    A. Endolymph
  • 5. 

    The bony labyrith and the membranous labyninth are parts of the

    • Middle ear

    • Inner ear

    • Outer ear

    Correct Answer
    A. Inner ear
  • 6. 

    The vestibule, semicircular canals and    ---------- are parts of the bony labyrith.

    • Cocchlea

    • Stapes

    • Incus

    Correct Answer
    A. Cocchlea
  • 7. 

    In which structure is the organ of corti?

    • Semicircular canals

    • Vestibule

    • Utricle

    • Cocchlea

    Correct Answer
    A. Cocchlea
  • 8. 

    A tuft of motile cillia and 1 immotile cillium called a kinocillium is seen on this cell.

    • Sustentacular cell

    • Hair cell

    Correct Answer
    A. Hair cell
  • 9. 

    The cochlea ductt (scala media)  is in the middle of the scala vestibuli and

    • Spiral ligament

    • Scala tympani

    • Tectorial membrane

    • Modiolus

    Correct Answer
    A. Scala tympani
  • 10. 

    What are the two types of hair cells in the organ of corti: Check all that apply.

    • Inner hair cells

    • Outer hair cells

    • Upper hair cells

    • Lower hair cells

    Correct Answer(s)
    A. Inner hair cells
    A. Outer hair cells
    Explanation
    inner row has a single row from base to apex, outer hair cells - 3 rows

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  • 11. 

    The space between the product of the otic vesicle and the bony wall is filled with

    • Endolymph

    • Peri lymph

    • Para lymph

    • CSF

    Correct Answer
    A. Peri lymph
  • 12. 

    What fluid is between the membranous labyrinth and the bony labyrinth. This fluid is similar to CSF.?

    • Perilymph

    • Endolymph

    Correct Answer
    A. Perilymph
  • 13. 

    The hearing receptors are found in which structure?

    • Utricle

    • Saccule

    • Cocchlea duct

    • Semicircular ducts

    Correct Answer
    A. Cocchlea duct
  • 14. 

    The tubular protion spirals around to form the

    • Utricle

    • Cocchlea

    • Stapes

    • Malleolus

    Correct Answer
    A. Cocchlea
  • 15. 

    The saccule and utricle are part of the

    • Vestibular system

    • Cocchlea system

    • Cristae ampularis

    • Semicircular tubes

    Correct Answer
    A. Vestibular system
  • 16. 

    Which hair cell type is this? Flask shaped, surrounded by a cup shaped afferent nerve ending called a chalyx.

    • Type 1 hair cell

    • Type 2 hair cell

    Correct Answer
    A. Type 1 hair cell
  • 17. 

    What is the inner ear structure for hearing

    • Utricle

    • Vestibule

    • Cocchlea

    • Tympanic membrane

    Correct Answer
    A. Cocchlea
  • 18. 

    The membranous labyrynth is fillled with

    • Endolymph

    • Perilymph

    Correct Answer
    A. Endolymph
  • 19. 

    Dendrites of which cranial nerve are found in the macula of the utricule and saccule?

    • Chorda tympani

    • Vestibular portion of CN 8

    • Cocchela portion of CN 8

    • Facial nerve

    Correct Answer
    A. Vestibular portion of CN 8
  • 20. 

    What is the layer of gelatinous glycoprotein that lines the cristae ampulla?

    • Maculla

    • Cupulla

    • Vestibullar

    • Corti

    Correct Answer
    A. Cupulla
    Explanation
    The cupulla sort of acts like a flap. It is moved by fluid movement. When you move the head the fluid in the semicircular canals moves and pushes against the cupula. There are stereociliar cells in the cupula. Movement of the cupula causes depol or hyperpol of the sterociliar cells.

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  • 21. 

    Which of the hair cells in the organ of corti are responsible for sound?

    • Inner

    • Outer

    Correct Answer
    A. Inner
    Explanation
    the outer hair cells are more modulatory

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  • 22. 

    What is the name of the structure  that the inner ear develops from?

    • Bony labyrinth

    • Otic vesicle

    • Mesoderm

    • Utricle

    • Vestibule

    Correct Answer
    A. Otic vesicle
  • 23. 

    Part of the otic vesicle is absorbed by the_______ during the 5th week.

    • Ectoderm

    • Mesoderm

    • Endoderm

    • Neuroderm

    Correct Answer
    A. Mesoderm
  • 24. 

    The spiral ligament and bony canal are of __________ origin

    • Endodermal

    • Ectodermal

    • Mesodermal

    • Neuroectodermal

    Correct Answer
    A. Mesodermal
  • 25. 

    The malleus and the incus are from the

    • 1st pharyngeal arch

    • 2nd pharyngeal arch

    • 1st branchial groove

    • 2nd brnachial groove

    Correct Answer
    A. 1st pharyngeal arch
  • 26. 

    The external auditory canal forms from the

    • 1st pharyngeal groove

    • 2nd pharyngeal groove

    • 3rd pharyngeal groove

    • 3rd pharyngeal groove

    Correct Answer
    A. 1st pharyngeal groove
  • 27. 

    What is the function of the cristae ampullaris?

    • Gives information of the position of the neck

    • Gives information on the movement of the neck and shoulders

    • Gives information on the direction of movement

    • Gives information on the angle of movement

    Correct Answer
    A. Gives information on the direction of movement
    Explanation
    The maculae are static.

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  • 28. 

    How many types of hair cells are there?

    • 1

    • 2

    • 3

    • 4

    • 5

    Correct Answer
    A. 2
    Explanation
    The hair cell types have process of of bipolar neurons from the basal ganglia in the vestibule. The arrangement of these processes on the hair cells is different between these two types. Some these are efferent and some are afferent.

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  • 29. 

    The cocchlea duct is also known as the

    • Utricle

    • Vestibule

    • Scala media

    • Ancus

    Correct Answer
    A. Scala media
  • 30. 

    What transmits proprioceptive information to the brain via the vestibular division of the cranial nerve 8 regarding the position and movement of the head - i.e. equilibrium.

    • Middle ear

    • Outer ear

    • Eustachian tube

    • Internal ear

    • Tympanic membrane

    Correct Answer
    A. Internal ear
  • 31. 

    The internal ear is derived from the

    • Mesoderm

    • Labyrinth

    • Otic vesicle

    • Neuroendoderm

    Correct Answer
    A. Otic vesicle
  • 32. 

    What are the two portions of cranial nerve 8?

    • Auditory calaniculus

    • Vestibular

    • Semicircular canal

    • Spiral ganglia

    • Cochlea

    Correct Answer(s)
    A. Vestibular
    A. Cochlea
  • 33. 

    What surrounds the whole structure of the ear that eventually becomes the bony structure of the ear?

    • Ectoderm

    • Endoderm

    • Neuroderm

    • Neuroectoderm

    • Mesoderm

    Correct Answer
    A. Mesoderm
  • 34. 

    The neurons that are found in the modiolus are also known as

    • Auditory crest cells

    • Astroglial cells

    • Auditory microglial cells

    • Spiral ganglia

    Correct Answer
    A. Spiral ganglia
  • 35. 

    The macule of the utrice and saccule both consist of neuroepithelial cells covered by an otolitic membrane made up of a layer gelatinous glycoprotein and crystals/stones of ______ .

    • Sodium bicarbonate

    • Calcium carbonate

    • Struvite

    • Pottasium bicarbonate

    • Chlorida

    Correct Answer
    A. Calcium carbonate
  • 36. 

    The receptors on the hair cells are mechanoreceptors. Sound waves are transduced into

    • Vibrations

    • Action potentials

    • Oscillations

    Correct Answer
    A. Action potentials
  • 37. 

    The external ear comes from branchial arches 1 and 2.  1 gives rise to the anterior helix and 2 gives rise to the

    • Middle ear

    • Stapes

    • Antitragus and posterior helix

    • Ancus

    Correct Answer
    A. Antitragus and posterior helix
  • 38. 

    The structure between the stapes and the opening into the otic capsule is the ______ window.

    • Round window

    • Tympanc membrane

    • Oval window

    • Eustachian tube

    Correct Answer
    A. Oval window
    Explanation
    2 layer of epithelium and 1 layer of ectoderm

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  • 39. 

    The ventral protion of the tube known as the saccula develops a _______ outgrowth

    • Rectangulat

    • Circular

    • Tubular

    • Oval

    Correct Answer
    A. Tubular
  • 40. 

    The tympanic cavity is _______ filled

    • Water

    • Air

    • Perilymph

    • Endolymph

    Correct Answer
    A. Air
  • 41. 

    The transduction mechanism in the ear starts with the gelatinous material overlying the

    • Cocchlea duct

    • The hair cells

    • Tympanic membrane

    • Oval window

    Correct Answer
    A. The hair cells
  • 42. 

    What membrane sits on top of the hair cells in the organ of corti?

    • Vestibular

    • Tectorial

    • Basilar

    Correct Answer
    A. Tectorial
  • 43. 

    When the hair cells in the organ of corti are pushed towards the lateral wall after the basement membrane has deflected what occurs, depolarization or hyperpolarization?

    • Depolarization

    • Hyperpolarization

    Correct Answer
    A. Depolarization
    Explanation
    The afferent nerves are located on the inner hair cells. The outer hair cells are innervated by the efferent nerves. The outer are more modulatory.

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  • 44. 

    All the derivatives of the otic vesicle are filled with

    • Peri lymph

    • Endolymph

    • Hila lymph

    • CSF

    Correct Answer
    A. Endolymph
  • 45. 

    What bone sits on the tympanic membrane?

    • Stapes

    • Malleous

    • Incus

    • Bony labyrinth

    Correct Answer
    A. Malleous
  • 46. 

    The cocchlea associates with the ______

    • Organ of corti

    • Stapes

    • Incus

    • Malleus

    • Vestibule

    Correct Answer
    A. Organ of corti
  • 47. 

    The cochlear consists of a central pillar called a  _______ around which a hollow bony tube makes spiral turns.

    • Semicirular tubes

    • Vestibular pillar

    • Modiolus

    • Saccule

    Correct Answer
    A. Modiolus
  • 48. 

    Endolymph is rich in

    • Pottasium

    • Sodium

    • Calcium

    • Chlorida

    Correct Answer
    A. Pottasium
    Explanation
    It is similar to intracellular fluid.

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  • 49. 

    The sensory epithelium of the macula in the utricle is lined with

    • Microvilli

    • Stereocilia

    • Actin filaments

    • Laminab

    Correct Answer
    A. Stereocilia
    Explanation
    Stereocilia are also found in the crista ampularis as well. The sensory cells are in descrete areas otherwise the rest of the wall is simple cuboidal.

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  • Jul 07, 2022
    Quiz Edited by
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