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{{Point|In the resting membrane potential, inside the cell membrane is electrically negative, and outside positive.  In the action potential, the polarity of the potential reverses.}}
{{Point|In the resting membrane potential, inside the cell membrane is electrically negative, and outside positive.  In the action potential, the polarity of the potential reverses.}}


[[ファイル:02607en.jpg|400px|left]] 活動電位が発生していないときでも、神経細胞の膜内外には、電位が発生しています。この電位を「静止膜電位」とよびます。静止膜電位と活動電位との最大の違いは、電気的極性です。
[[ファイル:02607en.jpg|400px|left]] Even when the action potential is not being generated, there is a potential inside and outside the neuron membrane. This potential is called the 'resting membrane potential'.  The largest difference between the resting and action potential is the electric polarity.<br>
 
細胞膜の内側
 
細胞膜の外側
 
静止膜電位
 
陰性
 
陽性
 
活動電位
 
陽性
 
陰性
 
   
 
静止膜電位は約-80 mVであり、活動電位は約+20 mVです。膜電位は、細胞膜内外のイオンの濃度差によって発生します。


The potential of the resting membrane is about -80 mV, and that of action potential is about +20 mV.  The membrane potential is generated by the difference in ion concentration inside and outside the membrane.
{{QuizTitle}}
{{QuizTitle}}
<GIFT>
<GIFT>
//LEVEL:3
//LEVEL:3
//RAND
//RAND
神経細胞が静止状態でも、細胞膜には　 {=静止膜電位.~活動電位.~overshoot} がある。
Even at rest, {=resting membrane potential~action potential~overshoot} is generated in the neuron membrane.


//LEVEL:2
//LEVEL:2
//RAND
//RAND
神経細胞の静止膜電位は、細胞内(細胞膜の内側)が　 {=陰性.~陽性} である。
In resting membrane potential, it is electrically {=negative~positive} inside the membrane.


//LEVEL:2
//LEVEL:2
//RAND
//RAND
神経細胞の活動電位は、細胞内(細胞膜の内側)が　 {~陰性.=陽性} である。
In action potential, it is electrically {~negative~=positive} inside the membrane.


//LEVEL:3
//LEVEL:3
//NO-RAND
//NO-RAND
神経細胞の静止膜電位は、通常、約　 {~+.=-} 　 {=80.~20.~4} mVである。
The resting membrane potential of a neuron is about {~+~=-} {=80~20~4} mV.


//LEVEL:3
//LEVEL:3
//NO-RAND
//NO-RAND
神経細胞の活動電位は、通常、約　 {=+.~-} 　 {~80.=20.~4} mVである。
The action potential of a neuron is about {=+~-} {~80~=20~4} mV.


//LEVEL:4
//LEVEL:4
//RAND
//RAND
膜電位は、細胞膜内外の　 {~浸透圧.=イオンの濃度.~水圧} の差によって発生する。
Membrane potential is generated by difference in {~osmotic pressure~=ion concentration~water pressure} inside and outside the cell membrane.
</GIFT>
</GIFT>

2014年11月18日 (火) 21:47時点における最新版

POINT!
In the resting membrane potential, inside the cell membrane is electrically negative, and outside positive. In the action potential, the polarity of the potential reverses.
02607en.jpg

Even when the action potential is not being generated, there is a potential inside and outside the neuron membrane. This potential is called the 'resting membrane potential'. The largest difference between the resting and action potential is the electric polarity.

The potential of the resting membrane is about -80 mV, and that of action potential is about +20 mV. The membrane potential is generated by the difference in ion concentration inside and outside the membrane.

Challenge Quiz

1.

Even at rest, resting membrane potential action potential overshoot is generated in the neuron membrane.

2.

In resting membrane potential, it is electrically negative positive inside the membrane.

3.

In action potential, it is electrically negative positive inside the membrane.

4.

The resting membrane potential of a neuron is about + - 80 20 4 mV.

5.

The action potential of a neuron is about + - 80 20 4 mV.

6.

Membrane potential is generated by difference in osmotic pressure ion concentration water pressure inside and outside the cell membrane.

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