Question

Select all that apply

Which is associated with a louder sound?
More vigorous vibration of the basilar membrane
Higher firing frequency of axons in the cochlear nerve
IHCs activated in a narrower band of the cochlea
Greater number of hair cells excited

Answer 1

A louder sound is associated with a more vigorous vibration of the basilar membrane, a higher firing frequency of axons in the cochlear nerve, and a greater number of excited hair cells.

Step-by-step explanation:

Associations with a louder sound include:

• More vigorous vibration of the basilar membrane.
• Higher firing frequency of axons in the cochlear nerve.
• A greater number of hair cells excited.

The loudness of a sound is generally determined by the amplitude of the sound waves, which corresponds to the degree of movement in the cochlea's basilar membrane. This movement triggers various responses in the hair cells, which then transmit signals through the cochlear nerve to be interpreted by the brain. The greater the amplitude of the sound waves, the more vigorous the vibration of the basilar membrane, leading to a higher firing frequency of axons in the cochlear nerve and an increased number of activated hair cells.