If Na+ channels are opened in a cell that was previously at rest, how will the resting membrane potential be affected?
(a) The membrane potential is not affected by Na+.
(b) It becomes more negative.
(c) It becomes more positive.
(d) It is permanently reset.
(c) As Na+ ions move into the cell, the net charge becomes more positive (less negative) and the membrane potential changes to reflect the Co/Ci for both Na+ and K+ ions.
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