Relative responsiveness (rho): a critical analysis of a new method in receptor differentiation

The rho ratio, which measures the capability of a receptor system to induce a maximal contraction after saturation by a full agonist was analysed from the standpoint of its variability considering the values obtained either for a given receptor system in the same type of preparation or for different types of preparation. This variability was discussed on the grounds of receptor theory, as the basis for a new method in receptor differentiation.