摘要: A system consisting of two solutions separated by a membrane may be in one four possible states: (1) transient, (2) steady, (3) equilibrium, or (4) pseudo-equilibrium. The latter state denotes that the net flow all components is zero but at least not thermodynamic equilibrium. Transient and steady-state systems have active transport. Thus only either equilibrium pseudo-equilibrium are considered this paper, since former indicates there no transport, whereas case always This simplifies problem finding whether does an transport mechanism, it frequently fairly easy to determine experimentally