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Once an action potential is triggered, the first major chemical change is?
A) a reversal of the membrane polarity, with the interior of the cell becoming positively charged.
B) a reversal of the membrane polarity, with the interior of the cell becoming negatively charged.
C) an increase in the negative charges inside the neuron.
D) a sudden rush of potassium into the neuron.
E) a sudden impermeability of the membrane to the transport of ions.
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