La __________ es el tiempo mínimo necesario para que un estímulo con el doble de la reobase genere un potencial de acción.
Si un estímulo no supera el umbral no se generará la respuesta o potencial de acción, en este caso, al no superarlo se le conocerá como estímulo ______.
El estímulo adecuado es uno que sea lo suficientemente potente como para reducir la __________ de la célula, hasta que se alcance el valor umbral del PA de la membrana.
La conductancia al ion ________ supera temporalmente su estado basal, provocando una hiperpolarización transitoria antes de que la membrana recupere su potencial de reposo.
Durante el estado de ______ la compuerta del canal
de potasio está cerrada, lo que impide que los iones potasio
pasen a través de este canal hacia el exterior.
Un estímulo mediado por un ________ es conocido como un estímulo de tipo químico, este actuará con un receptor específico, un ejemplo podría ser la ACh.
La _______ se conoce como la capacidad de responder a un estímulo o impulso, a su vez les permite a las células la propagación de potencial de acción.
Verticales
Periodo __________, se refiere a que después de un potencial de acción, la célula excitable tiene un periodo en el que es más difícil o imposible desencadenar otro potencial de acción.
En la curva intensidad-duración, la pendiente de la curva depende de la excitabilidad de la __________.
La curva intensidad-duración de un potencial de acción muestra la relación entre la intensidad del estímulo y su __________ mínima para generar una respuesta.
El potencial de acción tiene una duración ___________. Es decir, es una duración característica.
La __________ es la intensidad mínima de corriente necesaria para generar un potencial de acción con un estímulo de duración infinita.
Durante el estado de reposo, hay una alta _____ de K+.
Si un estímulo no supera el _______ no se generará la respuesta o potencial de acción, en este caso, al no superarlo se le conocerá como estímulo subumbral.
La propagación de un potencial de acción a través de células se da por los cambios en los ______ dados por la apertura y cierre de canales ionicos.
El desplazamiento de cargas eléctricas positivas a lo largo del axón, debido a la entrada de iones _________, permite la propagación del potencial de acción.
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