Which best compares radiation and conduction? check all that apply. both transfer thermal energy from warm objects to cooler objects. both can transfer energy through empty space. both transfer thermal energy by electromagnetic waves. both can transfer energy through matter. both involve the transfer of energy through direct contact.

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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