The equilibrium potential for a given ion (Eion) is a theoretical value. For a given concentration gradient of an ion, the equilibrium potential is the charge inside the cell required to hold an ion at that concentration. That is, it is the charge required to perfectly oppose the drive of the ion to move down its concentration gradient. So, if the concentration of Nat is higher outside the cell than inside, its equilibrium potential (ENa) must be I and if we add more sodium to the extracellular fluid, then ENa will II.

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The equilibrium potential for a given ion (Eion) is a theoretical value. For a given concentration gradient of an ion, the equilibrium potential is the charge inside the cell required to hold an ion at that concentration. That is, it is the charge required to perfectly oppose the drive of the ion to move down its concentration gradient. So, if the concentration of Nat is higher outside the cell than inside, its equilibrium potential (ENa) must be I and if we add more sodium to the extracellular fluid, then ENa will II.
The equilibrium potential for a given ion (Eion) is
a theoretical value. For a given concentration
gradient of an ion, the equilibrium potential is
the charge inside the cell required to hold an
ion at that concentration. That is, it is the
charge required to perfectly oppose the drive of
the ion to move down its concentration
gradient. So, if the concentration of Nat is
higher outside the cell than inside, its
equilibrium potential (Ena) must be i, and
if we add more sodium to the extracellular fluid,
then ENa will ¡¡
O i: negative, ii: become more negative
i: negative, ii: become more positive
O i: negative, ii: not change
Oi: positive, ii: become more negative
i: positive, ii: become more positive
Oi: positive, ii: not change
Transcribed Image Text:The equilibrium potential for a given ion (Eion) is a theoretical value. For a given concentration gradient of an ion, the equilibrium potential is the charge inside the cell required to hold an ion at that concentration. That is, it is the charge required to perfectly oppose the drive of the ion to move down its concentration gradient. So, if the concentration of Nat is higher outside the cell than inside, its equilibrium potential (Ena) must be i, and if we add more sodium to the extracellular fluid, then ENa will ¡¡ O i: negative, ii: become more negative i: negative, ii: become more positive O i: negative, ii: not change Oi: positive, ii: become more negative i: positive, ii: become more positive Oi: positive, ii: not change
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