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Inner Ear Structure and Fluid Composition

Learn about the divisions of the inner ear - the outer bony labyrinth and the inner membranous labyrinth, along with the composition of the fluids present in each part. Understand the differences between perilymph and endolymph in the inner ear.

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Questions and Answers

What fluid surrounds the membranous labyrinth in the cochlea?

Endolymph

Which part of the cochlea transduces sound energy into action potentials?

Basilar membrane

What is the function of the auditory apparatus in the membranous labyrinth?

Transduction of sound energy

What is the composition of perilymph in the bony labyrinth similar to?

<p>Cerebrospinal fluid</p> Signup and view all the answers

Which structure gives attachment to the basilar membrane in the cochlea?

<p>Spiral lamina</p> Signup and view all the answers

What is the purpose of the vestibular apparatus in the membranous labyrinth?

<p>Balance and spatial orientation</p> Signup and view all the answers

What is the main difference between the cilia of outer and inner hair cells?

<p>Outer hair cell cilia project into the tectorial membrane, while inner hair cell cilia do not.</p> Signup and view all the answers

What is the function of the tip-links connecting the tips of the cilia in hair cells?

<p>Help move the bundle of stereocilia as a unit</p> Signup and view all the answers

What is the diameter range of stereocilia found at the apical surface of hair cells?

<p>0.2 to 0.8 μm</p> Signup and view all the answers

What is the main structural composition of stereocilia in hair cells?

<p>Contain cross-linked actin filaments surrounded by myosin molecules</p> Signup and view all the answers

How does the size of outer hair cells change along the basilar membrane?

<p>The size increases from base to apex.</p> Signup and view all the answers

How many stereocilia are typically found at the apical surface of a hair cell?

<p>50-100</p> Signup and view all the answers

What is the unit used to express the frequency of sound waves?

<p>Hertz</p> Signup and view all the answers

Which type of sound wave is perceived as musical sounds if regularly repeated?

<p>Pure tone</p> Signup and view all the answers

At what range of frequencies is the human ear most sensitive?

<p>100-5000 Hz</p> Signup and view all the answers

What medium allows sound waves to travel at a much greater speed compared to air?

<p>Solid</p> Signup and view all the answers

Which aspect of sound is defined as the subjective sensation produced by the frequency of sound?

<p>Pitch</p> Signup and view all the answers

What is a sinusoidal sound wave with only one frequency called?

<p>Pure tone</p> Signup and view all the answers

Which structure in the ear is responsible for pitch discrimination?

<p>Basilar membrane</p> Signup and view all the answers

Which hair cells in the basilar membrane respond maximally to low-frequency sound waves?

<p>Hair cells near the apical region</p> Signup and view all the answers

What is the primary factor involved in localizing the source of a low-frequency sound in the horizontal plane?

<p>Difference in time of arrival at the two ears</p> Signup and view all the answers

If a sound source is equidistant from both ears, what happens to the time of arrival at the two ears?

<p>The sound reaches both ears simultaneously</p> Signup and view all the answers

What is the minimum time difference that the brain can detect between the arrival of a sound at the two ears for frequencies below 3000 Hz?

<p>20 μs</p> Signup and view all the answers

In the horizontal plane, which ear perceives a higher intensity of a sound source located to one side?

<p>The ear nearer to the sound source</p> Signup and view all the answers

What is the primary focus of cognitive behavior modification?

<p>Modifying behavior through self-talk and cognitive strategies</p> Signup and view all the answers

Which of the following is NOT mentioned as a technique for teaching self-talk?

<p>Providing written prompts for the student to read silently</p> Signup and view all the answers

According to the information provided, which of the following is NOT recommended for coping with undesirable behaviors?

<p>Relying solely on punishment without reinforcing desired behaviors</p> Signup and view all the answers

Which principle is mentioned as a way to encourage positive behavior?

<p>The Premack principle</p> Signup and view all the answers

What is the purpose of using satiation as a technique for coping with undesirable behaviors?

<p>To reinforce the undesirable behavior until the student becomes bored with it</p> Signup and view all the answers

Which of the following is NOT mentioned as a way to encourage positive behavior?

<p>Cognitive restructuring</p> Signup and view all the answers

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