Nikolas
Created page with "== Ion channels == Ever wondered how ion channels can be specific for one ion? How can a Na+-channel not let K+ also pass through? Ion channels are a sort of “tube” in the cellular membrane. Because different ions have different sizes, it is obvious that ions which are too large for the tube cannot pass through. But what stops smaller ions from passing through? An energetical barrier does, not a physical barrier. When the “correct” ion passes through its ion ch..."