Ear MCQ 13+

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• In the middle ear
  ক

  Immobilizations of the foot plate of stapes causes greater deafness than removal of the ossicles

  খ

  Air pressure is normally atmospheric pressure

  গ

  The round window moves reciprocally with the oval window

  ঘ

  Destruction of auditory ossicles abolishes hearing

  ঙ

  Paralysis of auditory muscles makes sound more faint
• The structures concerned with hearing includes
  ক

  The middle ear

  খ

  The external ear

  গ

  Cochlea

  ঘ

  The semicircular canal

  ঙ

  The utricle and saccule
• The Eustachian tube
  ক

  Opens during swallowing

  খ

  Upper ⅓rd is bony while lower 2/3rd is fibrocartilagenous

  গ

  Ventilates the middle ear

  ঘ

  Is wider and horizontal in adult

  ঙ

  It ends 1 cm behind the posterior end of the inferior turbinate in oropharynx
• Inner ear includes
  ক

  Vestibules

  খ

  Bony semicircular canal

  গ

  Organ of Corti

  ঘ

  Ossicles

  ঙ

  Aditus and antrum
• In the middle ear the
  ক

  Floor overlies the jugular foramen

  খ

  Muscles attached to the ossicles are supplied by the 5th and 7th cranial nerves

  গ

  The nerve lies on the tympanic membrane in the lateral wall.

  ঘ

  Facial nerve descends through the anterior wall

  ঙ

  Foot plate of the stapes overlies the round window
• Membranous labyrinth consists of
  ক

  Duct of cochlea

  খ

  Utricle

  গ

  Semicircular canal

  ঘ

  Vestibule

  ঙ

  oval window
• Intrinsic muscles of auricle are
  ক

  Tragicus

  খ

  Helicis major

  গ

  Antitragicus

  ঘ

  Auricularis anterior

  ঙ

  Auricularis superior
• The hair cells of semicircular canals are stimulated by
  ক

  Rotational acceleration

  খ

  Linear acceleration

  গ

  Rotation at a constant velocity

  ঘ

  Cessation of rotation

  ঙ

  Changes in gravitational pull
• The hair cells of semicircular canals arestimulated by
  ক

  Rotational acceleration

  খ

  Linear acceleration

  গ

  Rotation at constant velocity

  ঘ

  Changes in gravitational pull

  ঙ

  Cessation of rotation
• Eustachian tube
  ক

  Opens during swallowing

  খ

  Balances the middle ear pressure

  গ

  Is wider and horizontal in adult

  ঘ

  Is composed of bony part at its entire length

  ঙ

  Ends l(oncm behind the posterior end of inferior turbinate in oropharynx
• Relations of external auditory canal
  ক

  Middle cranial fossa

  খ

  above

  গ

  Temporomandibular joint infront

  ঘ

  Mastoid anturm posteromedial

  ঙ

  Mastoid air cells infront

  চ

  Parotid gland behind