given the high relative potency of salbutamol in the human myocardial strips ( analogous to that previous shown in the beta 2-dominated atria of the frog and trout ) and the low relative potency of salbutamol in the rat tissue , these findings indicate a greater population of functionally active beta 2-adrenoceptors in the human than in the rat myocardium .
C0001643
beta
C0086418
human