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</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</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)</p> Signup and view all the answers

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

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

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

    <p>Modiolus</p> Signup and view all the answers

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

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

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

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

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

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

    What structure covers the sensory cells in the auditory system?

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

    What is the role of the Organ of Corti?

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

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

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

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

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

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

    <p>3</p> Signup and view all the answers

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