What does transmission of sound through the middle ear result in?
A) amplification of the pressure vibrations
B) stimulation of middle ear receptor cells
C) opening of the eustachian tube
D) increased firing rate in sensory axons associated with the tympanic membrane

Question

Quizplus · Accepted Answer

The transmission of sound through the middle ear involves the amplification of the pressure vibrations by the middle ear bones (malleus, incus, and stapes), which results in a greater force being applied to the oval window of the inner ear.

Answer: D
 The firing rate of sensory axons associated with the tympanic membrane (part of the outer ear) is not directly affected by transmission of sound through the middle ear. The sensory cells in the cochlea of the inner ear, however, are stimulated by the pressure waves created by the middle ear bones, which triggers the firing of sensory axons and subsequent perception of sound.

Answer: B and C
 Stimulation of middle ear receptor cells is not a known phenomenon. However, the opening of the eustachian tube, which connects the middle ear to the pharynx, is an important process for maintaining equal pressure across the eardrum and reducing the risk of damage from sudden changes in pressure (such as during air travel).

What Does Transmission of Sound Through the Middle Ear Result