1 the actions of carbachol on the membrane potential and conductance of smooth muscle of the guinea-pig intestine were investigated using microelectrode recording and the double sucrose-gap method in solutions in which calcium was the only cation creating an inwardly-directed electrochemical gradient.2 in a calcium chloride solution containing a small amount of potassium but no sodium and buffered to physiological ph ( ca locke ) the membrane was hyperpolarized to more than -80 mv .
C0006675
calcium
C0006686
calcium chloride