20 Questions
Which structure lies above the stereocilia of the hair cells?
Tectorial membrane
What begins the neural transduction of auditory signal?
Bending of the stereocilia
Which type of hair cells are responsible for transmitting approximately 90% of auditory signals?
Inner hair cells
How many times more outer hair cells are there compared to inner hair cells?
3-4 times
What is the potential role of outer hair cells in relation to inner hair cells?
Controlling sensitivity for different sound pitches
Which component of the cochlea contains fibers that vibrate like a musical reed?
Basilar membrane
What is the function of the round window in the cochlea?
To decompress acoustic energy that enters the cochlea
What determines the frequency of sound perceived?
Position along the basilar membrane where hair cells are stimulated
How is sound intensity expressed?
In decibels
What is the threshold for citric acid to be perceived as sour?
2 mM
Which structure functions to transmit vibrations in the air to the cochlea?
The Tympanic Membrane
What is the purpose of the attenuation reflex in the ossicular system?
To protect the cochlea
Which muscle is the smallest skeletal muscle in the body?
Stapedius
What is the function of the organ of Corti?
To generate nerve impulses
What is the role of the ossicles in the auditory system?
To transmit sound waves to the cochlea
What is the purpose of the tympanic membrane being larger than the oval window?
To amplify sound vibrations
Which two muscles are involved in the attenuation reflex?
Stapedius and tensor tympani
What is the purpose of the attenuation reflex in reducing sound transmission?
To dampen sound vibrations
Which part of the cochlea contains the hair cells?
Scala media
What causes back and forth movement of the tympanic membrane?
Sound waves
Test your knowledge on the functions and connections of the tympanic membrane and ossicular system in the sense of hearing. Explore the role of the tympanic membrane in transmitting vibrations and amplifying signals to the inner ear.
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