What occurs electrically when a nerve signal is sent?
A. The membrane is depolarized as the action potential causes sodium ions to flood into the
axon and reverse the charge across the plasma membrane.
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B. The dendrites expel negative potassium charges, creating a positive charged environment
that draws the signal into the cell body.
C. The membrane is polarized as the action potential creates a potential difference across the
plasma membrane.
D. The action potential triggers the Schwann cells to contract, pushing sodium ions out of the
membrane to bring it to a resting potential.