Podcast
Questions and Answers
Which structure in the organ of Corti moves due to sound vibrations transmitted by the stapes?
Which structure in the organ of Corti moves due to sound vibrations transmitted by the stapes?
- Scala media
- Scala tympani
- Tectorial membrane
- Scala vestibuli (correct)
Which of the following ions enter the hair cells when ion channels open due to stereocilia bending?
Which of the following ions enter the hair cells when ion channels open due to stereocilia bending?
- Potassium and calcium (correct)
- Calcium and chloride
- Magnesium and potassium
- Sodium and chloride
What substance is released when potassium and calcium enter the hair cell, triggering activation of cochlear nerves?
What substance is released when potassium and calcium enter the hair cell, triggering activation of cochlear nerves?
- GABA
- Dopamine
- Glutamate (correct)
- Acetylcholine
Which part of the organ of Corti lies free in the scala media and is attached only on one side?
Which part of the organ of Corti lies free in the scala media and is attached only on one side?
What happens when the basilar membrane vibrates due to pressure waves in the scala vestibuli and scala media?
What happens when the basilar membrane vibrates due to pressure waves in the scala vestibuli and scala media?
Which component of the cochlear apparatus does not play a direct role in transmitting sound vibrations to the hair cells?
Which component of the cochlear apparatus does not play a direct role in transmitting sound vibrations to the hair cells?
Which type of ion channel opens when the stereocilia bend due to movements of the basilar membrane?
Which type of ion channel opens when the stereocilia bend due to movements of the basilar membrane?
What happens immediately after the activation of postsynaptic cochlear nerves due to glutamate release?
What happens immediately after the activation of postsynaptic cochlear nerves due to glutamate release?
If the stereocilia do not bend, which of the following processes does not occur?
If the stereocilia do not bend, which of the following processes does not occur?
What is the mechanism behind the hair cells' response to sound waves?
What is the mechanism behind the hair cells' response to sound waves?
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