Which of the Following Conditions Are Among the Requirements for a Nernst

question 14

Multiple Choice

Which of the following conditions are among the requirements for a Nernst equilibrium potential to exist for a given charged ion species across a semipermeable membrane as in an ion-selective electrode?

• A) The semipermeable membrane must be permeable to many ion species.
• B) A concentration gradient for a given charged ion species must exist across that membrane.
• C) If a membrane is permeable to two different ion species,then the ion activity of both species can be measured.
• D) The membrane potential across a semipermeable membrane must be constantly changing.

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