Potencial De Membrana Flashcards

1
Q

Despolarizacion

A

Hace que el potencial de membrana sea menos negativo (+)

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2
Q

Hiperpolarizacion

A

Hace que el potencial de membrana sea más negativo -70mV debido a que el K+ sale de la célula

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3
Q

Potencial de membrana en reposo

A

Diferencia del potencial intracelular respecto al potencial extra celular

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4
Q

Quien ingresa en la despolarizacion?

A

El Na +

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5
Q

Quien sale en la repolarizacion?

A

El K +

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6
Q

Que es el umbral de accion

A

El mínimo estímulo para generar el potencial de acción (abrir canales de Na)

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7
Q

A que voltaje se abren las puertas de K+

A

-10mv

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8
Q

Donde actúa la bomba Na/K

A

En la posthiperpolarizacion y vuelve a su PMR

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9
Q

Bloqueantes de los canales de Na+

A

Tetradotoxina (TTX)

Saxitoxina

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10
Q

Bloqueante del canal de K+

A

Tetraetilamonio (TEA)

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11
Q

Hiperpotacemia \ hipercalemia

A

> 5mmEq/L provoca un paro en sístole

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12
Q

Hipopotasemia / hipocalemia

A

< 4.5 mmEq/L Provoca un paro en la diástole

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