The medium of a wave is. Select one:

a.
a dashed line indicating the resting position of the wave

b.
where the average position of the wave is located

c.
what the wave is traveling through

d.
the middle point of the wave

answer; ///i believe that the correct answer is (a) specialized cells)

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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