If one insect needs 25 pieces of plant material to live how many drops of methylmercury end up in its body?

If 1 insect eats 25 pieces of plant material to live, it would simply have 25 pieces of methyl mercury in its body.  :)

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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