_Y_+20
_IMG_48_13ActionPotGenerat4.jpg
<strong>Falling phase of the action potential.</strong><br>
Most <b>Na<sup>+</sup></b> channels close and <b>K<sup>+</sup></b> channels open.<br>
<b>K<sup>+</sup></b> ions flow out of the cell, again making the inside of the cell <strong>negative</strong>.