ENT: PRACTICE 3

                              SINGLE BEST OPTION SERIES
               INSTRUCTION: SELECT THE SINGLE BEST OPTION

1.        During physical examination of the normal ear, the following are visible with an otoscope/auriscope except:
   a.       Reflected cone of light
   b.      Pearly grey tympanic membrane
   c.       Umbo
   d.      Handle of malleus
   e.      Saccule
   2.       Which of the following is incorrect about the tympanic membrane?
   a.       It is oval shaped structure
   b.      The lower two-thirds is thin and lax
   c.       The upper one-third is called pars flaccida
   d.      It has an outer squamous epithelium and inner mucous layer
   e.      It is concave outwards and convex inwards
   3.       Which of the following is incorrect about the middle ear cleft?
   a.       It has mastoid air cells
   b.      It has a roof, floor, anterior, lateral, medial and posterior walls.
   c.       Hyperacusis occurs when there is damage to the tensor tymapani muscle
   d.      It communicates with nasopharynx
   e.      The ear ossicles are hammer, stirrup and incus
   4.       Which of the following is incorrect about the nose?
   a.       The lower two-thirds of the nasal cavity proper is lined by olfactory epithelium
   b.      The anterior opening of the nasal cavity is called nares
   c.       The vestibule of the nasal cavity is lined by skin with hairs and sebaceous glands
   d.      Olfactory nerve convey sensory information from the nose
   e.      None of the above
   5.       Which of the following is incorrect about the inner ear?
   a.       The membranous labyrinth is encased in a bony labyrinth
   b.      Perilymph in the inner ear is similar in concentration to intracellular fluid.
   c.       Disease conditions of the semi-circular canals may produce vertigo
   d.      The cochlear part of the labyrinth is responsible for hearing
   e.      The organ of Corti converts sound into electrical energy
   6.       The following are found in the medial wall of the nasal cavity proper except:
   a.       Quadrilateral cartilage
   b.      Turbinates
   c.       Vomer
   d.      Plate of ethmoid bone
   e.      None of the above
   7.       In the physiology of hearing, the correct order of movement of sound impulse is:
   a.       Tympanic membrane → ear ossicles → oval window → round window →tentorial membrane → air cells → organ of Corti → cochlear → cochlear nerve.
   b.      Round window → oval window → tympanic membrane → ear ossicles →tentorial membrane → air cells → cochlear → organ of Corti → cochlear nerve.
   c.       Tentorial membrane → tympanic membrane → ear ossicles → organ of Corti → round window → oval window → air cells → cochlear → cochlear nerve.
   d.      Cochlear nerve → Organ of Corti → Tympanic membrane → ear ossicles → oval window → round window →tentorial membrane → air cells → cochlear
   e.      None of the above.
   8.       Which of the following is incorrect about physiology of maintaining balance?
   a.       The eye contributes about 70% of balance function.
   b.      The semi-circular canal detects linear acceleration.
   c.       The ear contributes about 15% to balance function.
   d.      Any change in the movement of the head results in movement of the hair cells in opposite direction.
   e.      Proprioceptive sense plays a role in maintaining body balance.
   9.       Which of the following is incorrect about  superior canal dehiscence syndrome?
   a.       Patients may present with autophony
   b.      There is an opening in the bone overlying the superior semicircular canal of the inner ear.
   c.       Vertigo is an unusual presentation of this syndrome
   d.      There may be sound induced loss of balance
   e.      The dehiscence acts as a ‘third window’ resulting in low-frequency hearing loss.
   10.   Which of the following is incorrect about the nerve supply of the ear?
   a.       The auricular branch of the vagus nerve supply the anterior wall and roof of the external auditory canal
   b.      Jacobson’s nerve supply the medial surface of the tympanic membrane
   c.       The auriculotemporal nerve supplies the tragus, crus of the helix and adjacent parts of the helix.
   d.      The Arnold’s nerve supplies the concha
   e.      None of the above.
   
   
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