Do You Know Auditory System? Play This Quiz
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The ear canal is also known as:
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Tympanic membrane
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Basial membrane
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External auditory meatus
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Ossicular system
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The auditory system is a body system that is responsible for the sense of hearing. The primary auditory cortex lies in the superior temporal gyrus of the temporal lobe and extends into the lateral sulcus and the transverse temporal gyri. Test out what else you know about the system through the questions below.
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- 2.
The frequency range for human hearing is:
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10-10,000 Hz
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20-20,000 Hz
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30-30,000 Hz
Correct Answer
A. 20-20,000 HzExplanation
The frequency range for human hearing is commonly accepted to be between 20 and 20,000 Hz. This range covers the majority of sounds that humans are capable of perceiving, from low-pitched sounds like a deep voice or a bass guitar, to high-pitched sounds like a whistle or a violin. Frequencies below 20 Hz are typically felt as vibrations rather than heard as distinct sounds, while frequencies above 20,000 Hz are often difficult for most people to hear due to age-related hearing loss or damage to the auditory system.Rate this question:
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- 3.
A bigger amplitude for sound pressure levels corresponds to:
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Higher frequency
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Higher pitch
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Louder sound
Correct Answer
A. Louder soundExplanation
A bigger amplitude for sound pressure levels corresponds to a louder sound because the amplitude of a sound wave represents the maximum displacement of particles in the medium. A larger displacement means that the sound wave is exerting more pressure on the particles, resulting in a stronger compression and rarefaction of the medium. This increased compression and rarefaction leads to a higher intensity of the sound wave, which our ears perceive as a louder sound.Rate this question:
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- 4.
Louder sounds will result in ________ movement of the basilar membrane and a subsequent ___________ in glutamate release
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Greater; decrease
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Less; increase
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Greater; increase
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Less; decrease
Correct Answer
A. Greater; increaseExplanation
When sounds are louder, they cause the basilar membrane in the ear to vibrate with greater intensity. This increased movement of the basilar membrane leads to an increase in the release of glutamate, a neurotransmitter, in the auditory nerve. Therefore, the correct answer is "greater; increase."Rate this question:
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- 5.
The pitch (tone) of a sound depends on the amplitude.
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True
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False
Correct Answer
A. FalseExplanation
pitch depends on frequencyRate this question:
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- 6.
The basilar membrane can 'code for frequencies' by vibrating maximally at certain points in the cochlea. The base vibrates maximally for ____ freqs and the apex vibrates maximally for ____ freqs
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Low; high
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High; low
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Mid; high
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High; mid
Correct Answer
A. High; lowExplanation
The basilar membrane is a structure within the cochlea that plays a crucial role in the process of hearing. It is responsible for converting sound vibrations into electrical signals that can be interpreted by the brain. The basilar membrane is not uniform in its properties, but rather varies in stiffness along its length. This variation allows it to vibrate maximally at different points in response to different frequencies of sound. The base of the basilar membrane, which is narrower and stiffer, vibrates maximally in response to high frequencies. On the other hand, the apex, which is wider and more flexible, vibrates maximally in response to low frequencies. Therefore, the correct answer is "high; low".Rate this question:
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- 7.
When exposed to loud/damaging sounds, what will manifest physically in the auditory system?
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Skewed basilar membrane
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Fractured ossicles
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Missing hair cells/scar tissue
Correct Answer
A. Missing hair cells/scar tissueExplanation
Exposure to loud or damaging sounds can cause physical damage to the auditory system, specifically the hair cells in the cochlea. These hair cells are responsible for converting sound vibrations into electrical signals that can be interpreted by the brain. When they are damaged or destroyed, it can result in hearing loss or other auditory problems. Scar tissue may also form in the damaged area, further affecting the functioning of the auditory system. Therefore, the manifestation of missing hair cells and scar tissue is a likely consequence of exposure to loud or damaging sounds.Rate this question:
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- 8.
Amplitude (loudness) is encoded by the number of action potentials
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True
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False
Correct Answer
A. TrueExplanation
The statement is true because amplitude, which refers to the loudness of a sound, is encoded by the number of action potentials generated by the auditory neurons in response to the sound stimulus. When a sound is louder, it causes a greater displacement of the hair cells in the inner ear, resulting in a higher firing rate of action potentials. Therefore, the brain can interpret the loudness of a sound based on the number of action potentials transmitted from the auditory neurons.Rate this question:
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- 9.
What ion is in high concentration in the endolymph of the scala media?
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Na
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Cl
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H
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K
Correct Answer
A. KExplanation
The ion in high concentration in the endolymph of the scala media is potassium (K+). This is because the endolymph is responsible for transmitting sound vibrations and potassium ions play a crucial role in the process of hearing. The high concentration of potassium in the endolymph helps to maintain the electrical potential necessary for the proper functioning of hair cells in the cochlea, which are responsible for converting sound waves into electrical signals that can be interpreted by the brain.Rate this question:
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- 10.
What is the normal threshold for hearing?
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15-20 dB
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25-30 dB
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40-50 dB
Correct Answer
A. 15-20 dBExplanation
The normal threshold for hearing is 15-20 dB. This means that for a person with normal hearing, they can detect sounds as low as 15-20 decibels. Anything below this threshold would be too quiet for them to hear.Rate this question:
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- 11.
What accounts for the amplification of sound vibrations in the middle ear?
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The decrease in surface area from the tympanic membrane to oval window
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The lever action of the ossicles
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The auricle of the ear
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The high sensitivity of the hair cells
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More than one of the above
Correct Answer
A. More than one of the aboveExplanation
Total Amp= 22x due to:
1. decrease in SA from tymp. memb. to oval window (55mm2---> 3.2 mm2) = 17x
2. lever action of ossicles 1.34 xRate this question:
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- 12.
What protects the ear from loud, low frequency sounds?
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Tymapnic membrane deflecting these frequencies
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Contraction reflex of ossicular muscles
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Oval window selectively choosing which frequencies can be transmitted
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None; that's why hearing loss can occur due to damaging sounds
Correct Answer
A. Contraction reflex of ossicular musclesExplanation
The contraction reflex of ossicular muscles is responsible for protecting the ear from loud, low frequency sounds. These muscles, including the tensor tympani and stapedius muscles, contract in response to loud sounds, which reduces the transmission of sound vibrations to the inner ear. This reflex helps to prevent damage to the delicate structures of the inner ear and ultimately protects our hearing.Rate this question:
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- 13.
The primary afferents for the auditory pathway is:
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Inferior colliculus
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Facial nerve
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Cochlear nuclei in medulla
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Spiral ganglion axons
Correct Answer
A. Spiral ganglion axonsExplanation
Spiral Ganglion -->Cochlear Nuclei in Thalamus ---> inferior colliculus ---> medial geniculate in thalamus ---> auditory cortexRate this question:
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- 14.
Inner Hair Cells synapse on a single nerve ending to trigger action potentials
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True
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False
Correct Answer
A. FalseExplanation
Inner hair cells synapse on multiple endings (they are more important than outer hair cells)Rate this question:
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- 15.
The cochlear nuclei goes bilaterally through the inferior colliculus via the _______________
Correct Answer
lateral lemniscusExplanation
The cochlear nuclei, which are responsible for processing auditory information, send signals bilaterally to the inferior colliculus. This connection is established through the lateral lemniscus, a pathway that carries auditory information from the cochlear nuclei to the inferior colliculus on both sides of the brain. The lateral lemniscus plays a crucial role in the transmission of auditory signals and is an important pathway in the auditory system.Rate this question:
- 16.
When contact lens wears initally use contact lenses is can be painful/uncomfortable. Eventually, they no longer can feel the contact lenses. Choose the answer that best describe what is occuring.
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Positive Feedback: inferior colliculus
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Negative Feedback: inferior colliculus
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Negative Feedback: superior olive
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Positive Feedback: superior olive
Correct Answer
A. Negative Feedback: superior oliveExplanation
superior olive sends inhibitory feedback to reduce the intensity of stimulation that the superior olive receives; this helps to prevent over-stimulationRate this question:
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- 17.
When you hear a loud sound and your eyes/head immediately turn towards that wound, what reflex is working?
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Superior olive
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Inferior colliculus
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Ossicular reflex
Correct Answer
A. Inferior colliculusExplanation
The correct answer is the inferior colliculus. The inferior colliculus is a structure in the midbrain that plays a crucial role in auditory processing. It receives information from the ears and helps to localize sounds in space. When a loud sound is heard, the inferior colliculus sends signals to the muscles that control eye and head movements, causing them to reflexively turn towards the sound source. This reflex allows for quick orientation towards potential threats or important stimuli in the environment.Rate this question:
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- 18.
What is the total stimulus energy range humans hear?
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10 Log Units
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20 Log Units
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12 Log Units
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100 Log Units
Correct Answer
A. 12 Log UnitsExplanation
The total stimulus energy range that humans hear is 12 Log Units. This means that the range of sound intensities that humans can perceive spans 12 logarithmic units, indicating a wide range of audible sounds from the softest to the loudest.Rate this question:
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- 19.
What allows us to differentiate louder sounds?
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Amount of depolarization of cell at peak moment
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Recruitment of cells at ends of basilar membrane
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Certain cells only respond to loud sounds
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2 of the above
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All of the above
Correct Answer
A. All of the aboveExplanation
All of the above options contribute to our ability to differentiate louder sounds. The amount of depolarization of a cell at the peak moment is a factor in perceiving loudness. The recruitment of cells at the ends of the basilar membrane also plays a role in distinguishing louder sounds. Additionally, certain cells specifically respond to loud sounds. Therefore, all of these factors combined allow us to differentiate louder sounds.Rate this question:
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- 20.
What is the total membrane potential difference at the tips of hair cells?
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-150 mV
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+150 mV
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-60 mV
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+60 mV
Correct Answer
A. -150 mVExplanation
This makes it easy to depolarizeRate this question:
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- 21.
The ossicular refelx involves which cranial nerve?
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Facial
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Optic
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Vestibulocochlear
Correct Answer
A. FacialExplanation
Ossicular Refles: superior olive sends info via facial nerve to the muscles surrounding the inner ear; this prevents damage from occurring in the hair cellsRate this question:
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- 22.
Describe the tonotopic map features of the auditory cortex as well as the binaural columns.
Quiz Review Timeline (Updated): Mar 21, 2023 +
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Apr 24, 2011Quiz Created by
Tseemore
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