Potencial de membrana Flashcards

1
Q

Potencial quimico

A

concentracion del soluto

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2
Q

Que se ocupa para calcular la diferencia de potencial electroquimico (soluto con cargas)?

A

La ecuacion de NERST

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3
Q

Que predice la ecuacion de nernst?

A

El potencial de membrana que genera un ion

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4
Q

Que es el potencial de membrana?

A

Potencial interno de la membrana menos el potencial externo

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5
Q

De que iones depende el equilibrio del Vm

A

Cl- y K+

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6
Q

cuales son las concentración de Cl- y K+ en el equilibrio?

A

*Cl- externo mayor que int
*K+ interno mayor ext

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7
Q

Electroneutralidad de los iones

A

*(Cl- ext) = (K+ ext)

*(Cl- int) + (Anion) = (K+ int)

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8
Q

Donde es mayor la suma de solutos, al interior o exterior de la membrana?

A

Interior

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9
Q

Que arregla el problema de la presion osmotica de la membrana?

A

Bomba Na/K, haciendo al Na impermeable

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10
Q

De que depende el reposo del Vm?

A

Depende del gradiente de concentración de los iones PERMEABLES, principalmente del K+

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11
Q

Cuando Vm sera positivo?

A

Cuando la concentracion de Na en el EXTERIOR sea mayor

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12
Q

De que depende el potencial de equilibrio de Vm?

A

El potencial de equilibrio se acercará mas al ion mas permeable

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