「Nerve06/autonomic nervous system and synapses/characteristics of synapses」の版間の差分

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[[ファイル:02519en.jpg|250px|left]]シナプス遅延
synaptic delay
[[ファイル:02700en.jpg|350px|left]]  


細胞内の伝導と比較すると、シナプス伝達は時間のかかる過程です。１カ所のシナプス伝達に1 msecかかると言われています。
Compared to conduction within a neuron, synaptic transmission is a time-consuming process.  The time it takes for one synaptic transmission is said to be one millisecond.


fatigue


[[ファイル:02701en.jpg|250px|left]] 疲労
[[ファイル:02519en.jpg|350px|left]]


シナプス伝達が頻回行われることにより、伝達物質が枯渇してしまい、シナプス前膜まで活動電位が来ても、シナプス後膜に活動電位が発生しにくくなることです。
With repeated synaptic transmission, decrease in the transmitter and efficiency of transmission may take place.  With such 'fatigue' an action potential arriving at the pre-synaptic membrane, may not be able to elicit action potential in the post-synaptic membrane.




 
synaptic potentiation
[[ファイル:02701en.jpg|350px|left]]


動画と音声での説明: Flash形式（Win, Mac） / MP4形式（iPad）
With repeated synaptic transmission, increase in the transmitter, post-synaptic membrane and efficiency of transmission may take place.  With such 'potentiation' an action potential arriving at the pre-synaptic membrane, may elicit many action potentials in the post-synaptic membrane.


[[ファイル:02700en.jpg|250px|left]] 反復刺激後増強


one-way
At synapses, pre and post are determined.  It is a one-way mechanism.


シナプス伝達が頻回行われることにより、シナプス後膜の感度が増大し、シナプス伝達の効率が増大することです。
sensitive to drug effects


１方向性
{{QuizTitle}}
 
シナプスは、前膜／後膜と方向性が決まっており、一方通行です。
 
薬物の影響を受けやすいです。
 
{{QuizTitle}}
<GIFT>
<GIFT>
//LEVEL:2
//LEVEL:2
//RAND
//RAND
シナプスの伝達は、一方向のみである。 {=正.~誤}  
At synapses, transmission is one-way {=true~false}  
 
//LEVEL:3
//RAND
シナプスでは、化学的に情報が伝達されるので、伝達速度は、神経線維の伝導速度と比べて　 {~速い.=遅い} 。


//LEVEL:3
//LEVEL:3
//RAND
//RAND
シナプス前膜に2個の活動電位が到来すると、シナプス後膜に発生する活動電位の数は、 {~2未満.~ちょうど2.~2より多い.=条件により一定しない} 。
At synapses, because of chemical transmission, the speed, compared to conduction is {~fast~=slow}.


//LEVEL:3
//LEVEL:3
//RAND
//RAND
シナプス前膜に2個の活動電位が到来し、最初の1個に対してシナプス後膜に1個の活動電位が発生し、次の1個に対してシナプス後膜に2個の活動電位が発生した場合、この現象は　 {=反復刺激後増強.~疲労} と表現される。
If, after the first action potential arriving at the pre-synaptic membrane, there was one action potential generated in the post-synaptic membrane, and after the second action potential arriving at the pre-synaptic membrane, there were two action potentials generated in the post-synaptic membrane,  {=potentiation~fatigue} took place.


//LEVEL:3
//LEVEL:3
//RAND
//RAND
シナプス前膜に2個の活動電位が到来し、最初の1個に対してシナプス後膜に1個の活動電位が発生し、次の1個に対してシナプス後膜に0個の活動電位が発生した場合、この現象は　 {~反復刺激後増強.=疲労} と表現される。
If, after the first action potential arriving at the pre-synaptic membrane, there was one action potential generated in the post-synaptic membrane, and after the second action potential arriving at the pre-synaptic membrane, there were no action potential generated in the post-synaptic membrane,  {~potentiation~=fatigue} took place.


//LEVEL:3
//LEVEL:3
//RAND
//RAND
シナプスは、低酸素や薬物の影響を　 {=受けやすい.~受けにくい} 。
Synapses have {=high~low} sensitivity to drugs.


//LEVEL:3
//LEVEL:3
//RAND
//RAND
シナプスの前膜は、 {=神経終末.~神経細胞体.~樹状突起} に存在する。
Pre-synaptic membrane is located at {=nerve ending~neuronal cell body~dendrites}.
</GIFT>
</GIFT>

2016年4月25日 (月) 00:17時点における最新版

synaptic delay

02700en.jpg

Compared to conduction within a neuron, synaptic transmission is a time-consuming process. The time it takes for one synaptic transmission is said to be one millisecond.

fatigue

02519en.jpg

With repeated synaptic transmission, decrease in the transmitter and efficiency of transmission may take place. With such 'fatigue' an action potential arriving at the pre-synaptic membrane, may not be able to elicit action potential in the post-synaptic membrane.


synaptic potentiation

02701en.jpg

With repeated synaptic transmission, increase in the transmitter, post-synaptic membrane and efficiency of transmission may take place. With such 'potentiation' an action potential arriving at the pre-synaptic membrane, may elicit many action potentials in the post-synaptic membrane.


one-way At synapses, pre and post are determined. It is a one-way mechanism.

sensitive to drug effects

Challenge Quiz

1.

At synapses, transmission is one-way true false

2.

At synapses, because of chemical transmission, the speed, compared to conduction is fast slow .

3.

If, after the first action potential arriving at the pre-synaptic membrane, there was one action potential generated in the post-synaptic membrane, and after the second action potential arriving at the pre-synaptic membrane, there were two action potentials generated in the post-synaptic membrane, potentiation fatigue took place.

4.

If, after the first action potential arriving at the pre-synaptic membrane, there was one action potential generated in the post-synaptic membrane, and after the second action potential arriving at the pre-synaptic membrane, there were no action potential generated in the post-synaptic membrane, potentiation fatigue took place.

5.

Synapses have high low sensitivity to drugs.

6.

Pre-synaptic membrane is located at nerve ending neuronal cell body dendrites .

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