The study of asymmetric transport phenomena in living systems through second-order phenomenological equations

In this study we approach the transport phenomena by second-order phenomenological equations. If the condition of Onsager is not accepted, then it results that in the living system there is asymmetrical transport. The experimental investigations proved that the exchange between Na+-Ca2+ is asymmetric, as there takes place the transport of three ions of Na+ to one ion of Ca2+. This is an instance of concordance between theory and experimental research.