Occurs when heat is transferred to an object through direct contact with particles; an example would be the heat from a stove transferring to your hand through the handle on a pot or pan.

The answer is A. Conduction

I just submitted the test, and it was correct.

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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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answer; i believe the correct answer is (a)0