“…),pentobarbital (0.5 mM), and protamine (100 μg per ml), which decrease the potassium uptake, and phenobarbital (0.5 mM), chlorpromazine (0.01 mM), atropine (… potassium uptake, suppress the stimulatory action of 3.6 mM potassium on respiration and markedly reduce the large stimulatory effect of 60 mM potassium.”