「Nervous system/overview of neurons/Channels/diffusion of ions/Na+channel and membrane potential」の版間の差分
ナビゲーションに移動
検索に移動
編集の要約なし |
編集の要約なし |
||
| 11行目: | 11行目: | ||
//LEVEL:3 | //LEVEL:3 | ||
//RAND | //RAND | ||
When the sodium (Na<sup>+</sup>) channel is open, intracellular membrane potential becomes {~negative | When the sodium (Na<sup>+</sup>) channel is open, intracellular membrane potential becomes {~negative~=positive}. | ||
</GIFT> | </GIFT> | ||
2014年11月18日 (火) 22:15時点における版
POINT!
| When the sodium (Na+) channel is open, intracellular membrane potential becomes positive. |
video: Flash（Win, Mac） / MP4（iPad）
The sodium channels open, sodium ions diffuse INTO the cell, the intracellular potential becomes positive, and because of this positive potential, some of the diffused ions are pushed back 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 .