By What Means Do We Perceive the Pitch of an Intermediate-Frequency

question 7

Multiple Choice

By what means do we perceive the pitch of an intermediate-frequency sound (such as 1000 Hz) ?

• A) A sound wave of 1000 Hz excites 1,000 hair cells to respond.
• B) A sound wave of a particular frequency excites hair cells at a particular location along the basilar membrane.
• C) Each hair cell sends one impulse for each sound wave.
• D) Each sound wave excites a group, or volley, of hair cells.

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Definitions:

Pith

The soft or spongy tissue in the center of stems in vascular plants, involved in storage and transport of nutrients.

Cortex

The outer layer of an organ or structure, such as the cerebral cortex of the brain or the cortex of the kidney, involved in various functions depending on the organ.

Intercellular Spaces

Gaps or areas between the cells of organisms, which in plants are often filled with air or fluid for the exchange of gases.

Cortex

The outer layer of various organs or body structures, such as the brain, kidneys, and hair.