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OHC and IHC Physiology - take the quiz

Which of the following structures are responsible for converting sound vibrations into electrical signals in the inner ear?
Outer hair cells
Inner hair cells
Tectorial membrane
Basilar membrane
What is the main neurotransmitter released by inner hair cells at the synapse with auditory nerve fibers?
Which of the following is NOT a characteristic of outer hair cells?
Stereocilia on their apical surface
Efferent innervation
Electromotility
Presence of prestin protein
What is the primary role of inner hair cells in the auditory system?
Amplify sound vibrations
Transmit sound signals to the brain
Protect the cochlea from damage
Regulate fluid pressure in the inner ear
Which of the following structures is responsible for detecting the frequency of sound waves in the cochlea?
Outer hair cells
Inner hair cells
Tectorial membrane
Basilar membrane
How many rows of outer hair cells are typically found in the mammalian cochlea?
One
Two
Three
Four
Which of the following is NOT a characteristic of inner hair cells?
Stereocilia on their apical surface
Afferent innervation
Sensitivity to sound vibrations
Presence of mechanosensitive ion channels
What is the primary function of the tectorial membrane in the cochlea?
Amplify sound vibrations
Transmit sound signals to the brain
Protect the inner ear from damage
Provide mechanical support for hair cells
Which of the following is responsible for converting mechanical vibrations in the cochlea into electrical signals?
Outer hair cells
Inner hair cells
Tectorial membrane
Spiral ganglion neurons
What is the primary role of outer hair cells in the cochlea?
Amplify sound vibrations
Transmit sound signals to the brain
Protect the inner ear from damage
Regulate fluid pressure in the cochlea
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