Card 7 / 22: What happens across the membrane of an electrically active cell is a dynamic process that is hard to visualize with static images or through text descriptions. View this animation ( http://openstaxcollege.org/l/dynamic1 ) to really understand the process. What is the difference between the driving force for Na+ and K+? And what is similar about the movement of these two ions?
Answer:
Sodium is moving into the cell because of the immense concentration gradient, whereas potassium is moving out because of the depolarization that sodium causes. However, they both move down their respective gradients, toward equilibrium.
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