The Ear
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Questions and Answers

Which fluid is referred to as perilymph?

  • Intracellular fluid
  • Endolymph
  • Plasma (correct)
  • Cochlear duct fluid
  • Which structure is critical for turning pressure waves into electrical signals?

  • Tectorial membrane
  • Basilar membrane
  • Organ of Corti (correct)
  • Kinocilium
  • What is the function of the kinocilium in hair cells?

  • To close ion channels
  • To hyperpolarize the hair cell membrane
  • To release neurotransmitters
  • To open ion channels (correct)
  • What happens when the cilia bend towards the kinocilium?

    <p>Opening of ion channels</p> Signup and view all the answers

    Where does the initial processing for pitch and loudness occur within the cochlear structure?

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

    What type of sound waves predominantly act on the stiff and inflexible region of the basilar membrane?

    <p>High frequency sound waves</p> Signup and view all the answers

    What type of sound waves reach the wider and more flexible region of the basilar membrane?

    <p>Low frequency sound waves</p> Signup and view all the answers

    What is the composition of perilymph?

    <p>Low potassium and high sodium</p> Signup and view all the answers

    What is the composition of endolymph?

    <p>High potassium and low sodium</p> Signup and view all the answers

    What is the fluid of the cochlear duct called?

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

    Which portion of the ear contains both the pinna and the ear canal?

    <p>External ear</p> Signup and view all the answers

    What is the purpose of the middle ear?

    <p>To transfer soundwave energy from the external to internal ears</p> Signup and view all the answers

    Which part of the ear is responsible for auditory functions?

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

    What does the term 'sound' refer to?

    <p>Our interpretation of the frequency, duration, and amplitude of sound waves</p> Signup and view all the answers

    Which structure in the middle ear connects to our pharynx?

    <p>Eustachian tube</p> Signup and view all the answers

    What is the purpose of the vestibular apparatus?

    <p>To govern the vestibular functions</p> Signup and view all the answers

    What is the function of hair cells in the cochlea?

    <p>To transduce auditory stimuli</p> Signup and view all the answers

    What gives us the perception of pitch?

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

    What gives us an index of intensity or loudness of sound?

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

    What is the purpose of the eardrum?

    <p>To segregate the external ear from the middle ear</p> Signup and view all the answers

    Which part of the ear is responsible for sensing rotational movements?

    <p>Vestibular apparatus</p> Signup and view all the answers

    What is the function of the cochlea?

    <p>To convert vibration waves into electrical signals</p> Signup and view all the answers

    How is spatial coding of pitch retained in the auditory system?

    <p>Through the basilar membrane</p> Signup and view all the answers

    What is the role of the thalamus in the auditory system?

    <p>To receive information from both ears</p> Signup and view all the answers

    What is the purpose of the vestibular apparatus in the inner ear?

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

    Which part of the ear is responsible for linear acceleration?

    <p>Vestibular apparatus</p> Signup and view all the answers

    What is the role of the vestibular nerve in the transmission of vestibular information?

    <p>To transmit vestibular information</p> Signup and view all the answers

    What is the orientation of the maculae of the utricle when an individual is in the upright position?

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

    What are the major reflexes in which the vestibular information participates?

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

    Where are the cristae, the sensory receptors for rotational movements, located?

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

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