... Membrane capacitanceA membrane and the intracellular and extracellular media, from an electronic engineer’s perspective, form a capacitor. A capacitor can storecharge. In the case of a membrane, ... the most important species of anions, were often consid-ered to move passively in reaction to cation transport, but they also havetransporters and ion channels and are therefore an often underratedphysiological ... membraneK+ channel Na+/K+ pump sodium-linkedglucose transporterFigure 2.3 Examples of an ion channel, an electrogenic pump and a co-transporter,depicted by the symbols most often used for...