has document part Choline as a tool to evaluate nicotinic receptor function in chromaffin cells. Choline as a tool to evaluate nicotinicreceptor function in chromaffin cells. Does an homomeric alpha7 nicotinic receptor exist in bovine chromaffin cells? Does an homomeric alpha7 nicotinicreceptor exist in bovine chromaffincells? Second messengers control the kinetics of exocytosis by modifying the intravesicular pH The secretory responses to choline and acetylcholine show different patterns and calcium dependence in chromaffin cells