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The frequency selectivity of the vibration of the cochlear partition structures depends on the function of the cells known as

These cells act like little motors and enhance the frequency  as well as the greater sensitivity to one frequency of sound than to others. 

Thus, damage to these cells at one point along the cochlea's length will cause these cells at that point to lose their normal high selectivity and sensitivity to one  of sound above others and they become both less sensitive to sounds overall and less  for frequency of sound.

These effects will be passed on to the auditory nerve fibres connected to the

Thus, the brain receives information from that point that is no longer sensitive for sounds and also less selective - i.e., you are hard of hearing for those frequencies to which that region of the cochlea used to be most sensitive.

Match the structures of the peripheral auditory system against the functions.

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Because the sound pressure variations of pure tones are  

Excitation of receptor cells occurs when movement of the partition causes the stereocilia to bend 

This is the direction which will permit flow of into the cells, causing the membrane potential to .  

Movement of the stereocilia in the opposite direction causes of the ion channels.

With respect to the image below which shows the flow of somatic sensory information  from the periphery into the spinal cord, for the pathways shown in panel A, where are the second order neurons located? 

In the main somatic pathways carrying proprioceptive information, the first order neurons are those 

With respect to the image below which shows the flow of somatic sensory information  from the periphery into the spinal cord, which of the following types of somatic information flows in the manner shown in panel B? 

In the pathways from the body surface carrying proprioceptive information, the third order neurons are those 

In the primary soamtosensory cortex, comparing RF sizes of neurons getting input from the shoulder and those getting input from the forearm, you would expect