BMS 143: Hearing and Balance Quiz
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Questions and Answers

What is the function of the round window?

  • It houses the sense organ for hearing
  • It vibrates the perilymph at the oval window
  • It separates the scala tympani from the middle ear (correct)
  • It separates the scala vestibuli from the middle ear
  • Which membrane is the floor of the cochlear duct?

  • The oval window membrane
  • The basilar membrane (correct)
  • The tectorial membrane
  • The vestibular membrane
  • Where are the auditory hair cells located?

  • On the basilar membrane
  • Within the scala vestibuli
  • On the tectorial membrane
  • Within the organ of Corti (correct)
  • How many rows of outer hair cells are present in the organ of Corti?

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

    What is the function of the stereocilia on hair cells?

    <p>They contact the tectorial membrane</p> Signup and view all the answers

    What occurs when outer hair cells depolarize?

    <p>They shorten</p> Signup and view all the answers

    What structures are linked by tip links?

    <p>Stereocilia tips in adjacent rows</p> Signup and view all the answers

    Which property of the basilar membrane determines pitch discrimination?

    <p>All of the above</p> Signup and view all the answers

    Which part of the ear is responsible for converting sound waves into nerve impulses?

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

    What is the function of the vestibular apparatus?

    <p>To maintain equilibrium and balance</p> Signup and view all the answers

    Which of the following statements about sound localization is true?

    <p>Sounds from behind are less clear due to the pinna shape</p> Signup and view all the answers

    What is the primary function of the Eustachian tube?

    <p>To equalize air pressure between the middle ear and the outside environment</p> Signup and view all the answers

    Which of the following is a fluid-filled compartment in the cochlea?

    <p>All of the above</p> Signup and view all the answers

    What separates the scala vestibuli from the middle ear?

    <p>Oval window</p> Signup and view all the answers

    Which of the following is NOT one of the three middle ear bones (ossicles)?

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

    What is the function of the pinna?

    <p>To collect and channel sound waves into the ear canal</p> Signup and view all the answers

    Which part of the cochlea is responsible for detecting low pitches?

    <p>The helicotrema</p> Signup and view all the answers

    What is the primary factor that determines the unique sound characteristics or timbre of a sound?

    <p>The presence of additional frequencies superimposed on the fundamental tone</p> Signup and view all the answers

    Which type of hearing loss is caused by a blockage in the external or middle ear, preventing sound waves from being adequately conducted to the inner ear?

    <p>Conductive deafness</p> Signup and view all the answers

    Which structure in the vestibular apparatus is responsible for detecting linear motion in the horizontal plane?

    <p>The utricle</p> Signup and view all the answers

    What is the primary cause of age-related hearing loss, also known as presbycusis?

    <p>Degeneration of hair cells in the cochlea over time</p> Signup and view all the answers

    Which type of hearing loss is caused by a defect or dysfunction in the organ of Corti, auditory nerve, or auditory cortex?

    <p>Sensorineural deafness</p> Signup and view all the answers

    What is the primary function of the kinocili in the vestibular apparatus?

    <p>To detect mechanical deformation and movement</p> Signup and view all the answers

    According to the information provided, approximately what percentage of cochlear hair cells are lost by the age of 65 due to age-related hearing loss?

    <p>40%</p> Signup and view all the answers

    What is the function of the otolith organ in the vestibular system?

    <p>Detection of linear motion</p> Signup and view all the answers

    What occurs when there is a mismatch between visual and spatial senses that leads to motion sickness?

    <p>Vestibular nerve transmits signals to the brain</p> Signup and view all the answers

    What happens during depolarization in the hair cells of the vestibular system?

    <p>Stereocilia bend towards the kinocilium</p> Signup and view all the answers

    Which component of the hair cell is covered by an ampullary cupula in the vestibular system?

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

    What is the purpose of the tip links connecting the hair cell to the stereocilia in the vestibular system?

    <p>To pull on mechanically gated ion channels</p> Signup and view all the answers

    During hyperpolarization in the hair cells, what is the position of the stereocilia relative to the kinocilium?

    <p>Bending away from the kinocilium</p> Signup and view all the answers

    Which structure in the otolith organ is penetrated by both kinocilium and stereocilia?

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

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