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Sumario Potenciales

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Este documento cuenta con los diferentes potenciales de acción y potenciales postsinápticos que ocurren en la neuronas

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Uploaded on
January 30, 2022
Number of pages
16
Written in
2021/2022
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Summary

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P O T E N C I A L E S

,Potencial de membrana o de reposo
Estado particular en el que se encuentra una membrana, donde existe u
diferencia de cargas eléctricas entre ambos lados de la membrana
plasmática.



La superficie interna tiene carga negativa.




El lado externo tiene carga positiva.

, ¿A qué se debe el
potencial de reposo?
1.- La membrana es más permeable al K+ que al Na+,
por lo que el interior tiene una alta concentración de
K+


2.- Existe una bomba sodio-potasio que genera una
diferencia de potencial (salen 3Na+ ; entran 2K+)


3.- Los canales iónicos activados por voltaje se
encuentran cerrados.


4.-Existe una concentración diferencial de Cl- (más
concentrado en el lado interno)


La dirección final de los iones es igual a la suma
de los gradientes químicos y eléctricos: el
potencial electroquímico
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