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

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

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

What is the composition of perilymph?

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

What is the composition of endolymph?

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

What is the fluid of the cochlear duct called?

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

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

<p>External ear (C)</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 (A)</p> Signup and view all the answers

Which part of the ear is responsible for auditory functions?

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

Which structure in the middle ear connects to our pharynx?

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

What is the purpose of the vestibular apparatus?

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

What is the function of hair cells in the cochlea?

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

What gives us the perception of pitch?

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

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

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

What is the purpose of the eardrum?

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

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

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

What is the function of the cochlea?

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

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

<p>Through the basilar membrane (A)</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 (C)</p> Signup and view all the answers

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

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

Which part of the ear is responsible for linear acceleration?

<p>Vestibular apparatus (D)</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 (A)</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 (A)</p> Signup and view all the answers

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

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

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

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