Which window in the middle ear is involved in allowing movement of cochlear fluids?

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Multiple Choice

Which window in the middle ear is involved in allowing movement of cochlear fluids?

Explanation:
The key idea is that moving the fluids inside the cochlea requires a flexible boundary to accommodate displacement. When the ossicles transmit vibrations to the oval window, pressure increases inside the cochlear fluids. The round window membrane moves in opposite phase, bulging outward to provide space for that incoming fluid to shift. This pressure relief lets the perilymph flow and generates the traveling waves that bend hair cells and produce neural signals. The eardrum and pinna aren’t directly involved in moving cochlear fluids; they simply collect sound and set the middle-ear chain vibrating.

The key idea is that moving the fluids inside the cochlea requires a flexible boundary to accommodate displacement. When the ossicles transmit vibrations to the oval window, pressure increases inside the cochlear fluids. The round window membrane moves in opposite phase, bulging outward to provide space for that incoming fluid to shift. This pressure relief lets the perilymph flow and generates the traveling waves that bend hair cells and produce neural signals. The eardrum and pinna aren’t directly involved in moving cochlear fluids; they simply collect sound and set the middle-ear chain vibrating.

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