Nervous system/overview of neurons/Channels/diffusion of ions/Na+channel and membrane potential
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POINT!
| When the sodium (Na+) channel is open, intracellular membrane potential becomes positive. |
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The <sodium channels open (開く)>, sodium ions <diffuse INTO> the cell, the intracellular potential becomes positive, and because of this <positive potential (blink)>, some of the diffused ions are <pushed back(移動)> out of the cell.
When the inward movement by diffusion and <outward movement by the electric force are balanced, the intracellular potential is called the‘equilibrium potential’.
The equilibrium potential for sodium is positive.
Challenge Quiz
1.
When the sodium (Na+) channel is open, intracellular membrane potential becomes negative.positive .