Anatomy of Cochlea: Organ of Corti and Hair Cells
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Questions and Answers

What is the name of the membrane found above the sensory cells in the maculae acusticae?

  • Tectorial membrane
  • Olfactory membrane
  • Perilymphatic membrane
  • Otolithic membrane (correct)

Which type of hearing loss is associated with malformations in the external and/or middle ear due to exposure to neonatal antibiotics like gentamicin?

  • Sensorineural hearing loss
  • Conductive hearing loss (correct)
  • Central hearing loss
  • Mixed hearing loss

What is the association between deafness and mutism?

  • Deafness causes mutism (correct)
  • Strong correlation but not a causal relationship
  • No association between deafness and mutism
  • Mutism causes deafness

Which mineral is found in the inclusions of the otolithic membrane above sensory cells?

<p>Calcium carbonate (D)</p> Signup and view all the answers

What causes conductive hearing loss in utero and is linked to infections like Cytomegalovirus and rubella?

<p>Malformations in the external and/or middle ear (A)</p> Signup and view all the answers

Which part of the ear is affected by the suppressed growth of auricular hillocks, resulting in microtia?

<p>External ear (auricle) (D)</p> Signup and view all the answers

What structure arises from the ventral component of the otic vesicle?

<p>Endolymphatic duct (A)</p> Signup and view all the answers

At what week does the cochlear duct form a tubular structure at its lower pole?

<p>6th week (C)</p> Signup and view all the answers

What does the cochlear duct penetrate in the surrounding mesenchyme in a spiral pattern?

<p>Modiolus (B)</p> Signup and view all the answers

Which structure separates the scala vestibuli from the scala tympani in the cochlear duct?

<p>Basilar membrane (D)</p> Signup and view all the answers

What important sensory structure develops from the dorsal component of the otic vesicle?

<p>Semicircular canals (B)</p> Signup and view all the answers

Which part of the ear remains connected to the surrounding cartilage by the spiral ligament?

<p>Cochlear duct (A)</p> Signup and view all the answers

What is the main function of hair cells in the auditory system?

<p>Generating electrical impulses (C)</p> Signup and view all the answers

What structure covers the sensory cells in the auditory system?

<p>Tectorial membrane (D)</p> Signup and view all the answers

What is the role of the Organ of Corti?

<p>Transmit impulses to the cochlear nerve (D)</p> Signup and view all the answers

Which structure is formed from the utricular part of the otic vesicle during development?

<p>Semicircular canals (D)</p> Signup and view all the answers

What is the main function of the crista ampullaris in the semicircular canals?

<p>Vestibular sensory function (D)</p> Signup and view all the answers

How many rows of outer hair cells are typically found in the cochlear duct?

<p>3 (C)</p> Signup and view all the answers

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