Which of the following is not part of the cell theory? Cells must contain DNA

Cells can only come from exsiting cells

all living things are made from cells

cells are the basic unit of life

I think it's number 2 (viewpoint)

answer; ///i believe the answer is (antioxidant);

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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