if , however , the cells were first activated by a muscarinic agonist , and receptor activation was terminated before the addition of ca2+ by the addition of a pharmacological excess of the muscarinic-receptor antagonist atropine , the initial increase in cytosolic [ ca2+ ] was faster and transiently larger than in the control cells which had not been previously stimulated .
C1383501
cytosolic
C0007634
cells