provide us with the actual rocks from inside Earth. They are considered evidence of Earth's interior
are a form of energy that travels through or across Earth and helps scientists inter what is inside
Earth. They are considered
evidence of Earth's interior,

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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