Auditory System Quiz
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Questions and Answers

What structure lies between the vestibular membrane and the basilar membrane in the cochlea?

  • Cochlear duct (correct)
  • Tectorial membrane
  • Spiral organ of Corti
  • Semicircular ducts
  • Where do the peripheral processes of the neurons from the spiral ganglion terminate?

  • At the base of the hair cells in the organ of Corti (correct)
  • In the tectorial membrane
  • In the vestibular apparatus
  • On the pyramidal cells of the cochlea
  • What stimulates the generation of nerve impulses during the hearing process?

  • Vibration of the vestibular membrane
  • Pressure changes in the semicircular ducts
  • Flow of endolymph in the cochlear duct
  • Movement of the tectorial membrane (correct)
  • What forms the cochlear nerve?

    <p>Central axons of neurons from the spiral ganglion</p> Signup and view all the answers

    How many openings do the semicircular ducts have into the utricle?

    <p>Five openings</p> Signup and view all the answers

    What type of acceleration does the utricle primarily detect?

    <p>Horizontal acceleration and motion in antero-posterior direction</p> Signup and view all the answers

    What structure connects the saccule to the cochlear duct?

    <p>Ductus reuniens</p> Signup and view all the answers

    Which of the following correctly describes the function of the semicircular canals?

    <p>Detect angular acceleration</p> Signup and view all the answers

    What is the role of the hair cells located in the macula of the utricle and saccule?

    <p>Detect linear head movement</p> Signup and view all the answers

    Which nerve is formed by the cochlear and vestibular nerves?

    <p>Vestibulocochlear nerve (CN VIII)</p> Signup and view all the answers

    What is the function of the neurons in the vestibular ganglion?

    <p>Transmit balance information to the brain</p> Signup and view all the answers

    Which part of the ear is responsible for collecting sounds?

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

    What is the function of the tympanic membrane?

    <p>Conducts sound to the auditory ossicles</p> Signup and view all the answers

    Which structure separates the external ear from the middle ear?

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

    Which type of tissue is the deepest part of the auricle primarily composed of?

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

    What is the main purpose of the auditory tube?

    <p>To equalize pressure</p> Signup and view all the answers

    The bones known as the auditory ossicles include which of the following?

    <p>Incus, malleus, and stapes</p> Signup and view all the answers

    Which part of the tympanic membrane is larger and tense?

    <p>Pars tensa</p> Signup and view all the answers

    Which nerve provides mainly sensory innervation to the external acoustic meatus?

    <p>Auriculotemporal nerve</p> Signup and view all the answers

    The structure that protects the inner ear and is vital for balance is known as what?

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

    The shape of the external acoustic meatus can be described as what?

    <p>S-shaped</p> Signup and view all the answers

    Which part of the middle ear connects with the mastoid cells?

    <p>Tympanic cavity</p> Signup and view all the answers

    What happens when the tympanic membrane is perforated?

    <p>It may lead to deafness</p> Signup and view all the answers

    Which muscle is responsible for dampening sounds caused by loud noises?

    <p>Stapedius muscle</p> Signup and view all the answers

    The lymph drainage of the external ear primarily goes to which lymph nodes?

    <p>Superficial cervical lymph nodes</p> Signup and view all the answers

    What is the function of the tensor tympani muscle?

    <p>To tense the tympanic membrane</p> Signup and view all the answers

    Which muscle is responsible for reducing the oscillatory range of the base of the stapes?

    <p>Stapedius muscle</p> Signup and view all the answers

    Where does the facial nerve exit the skull?

    <p>Stylomastoid foramen</p> Signup and view all the answers

    What type of fluid is found inside the membranous labyrinth?

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

    Which part of the ear contains structures responsible for detecting angular head movements?

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

    What structure is responsible for transmitting waves from the oval window to the cochlea?

    <p>Scala vestibuli</p> Signup and view all the answers

    What effect does a lesion of the facial nerve have on hearing?

    <p>Results in hyperacusis</p> Signup and view all the answers

    How many turns does the cochlea make around its bony core?

    <p>Two and a half turns</p> Signup and view all the answers

    Which part of the vestibule contains receptors for linear acceleration?

    <p>Utricle and saccule</p> Signup and view all the answers

    What is the role of perilymph?

    <p>To transmit fluid pressure to the cochlear duct</p> Signup and view all the answers

    Which two scalae are connected through the helicotrema?

    <p>Scala vestibuli and scala tympani</p> Signup and view all the answers

    Which structure sits between the cochlea and the semicircular canals?

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

    What is the primary function of the round window?

    <p>Absorb fluid pressure</p> Signup and view all the answers

    Which cranial nerve is responsible for innervating the stapedius muscle?

    <p>Facial nerve (CN VII)</p> Signup and view all the answers

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