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

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[[ファイル:02700en.jpg|350px|left]]  
[[ファイル:02700en.jpg|350px|left]]  


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.{{-}}
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
fatigue
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[[ファイル:02519en.jpg|350px|left]]
[[ファイル:02519en.jpg|350px|left]]


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.{{-}}
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.




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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.
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
one-way

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 .