「Nerve06/autonomic nervous system and synapses/characteristics of synapses」の版間の差分
Soichi.Nakatake (トーク | 投稿記録) 編集の要約なし |
Soichi.Nakatake (トーク | 投稿記録) 編集の要約なし |
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<synaptic delay> | <synaptic delay> | ||
[[ファイル:02700en.jpg| | [[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.{{-}} | ||
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<fatigue> | <fatigue> | ||
[[ファイル:02519en.jpg| | [[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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<synaptic potentiation> | <synaptic potentiation> | ||
[[ファイル:02701en.jpg| | [[ファイル:02701en.jpg|350px|left]] | ||
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. | ||
2012年9月28日 (金) 15:44時点における版
<synaptic delay>
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>
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>
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
At synapses, transmission is one-way true. false
At synapses, because of chemical transmission, the speed, compared to conduction is fast.slow .
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.
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.
Synapses have high. low sensitivity to drugs.
Pre-synaptic membrane is located at nerve ending. neuronal cell body. dendrites .