the aim of the present study was ( 1 ) to evaluate the functional contribution of nicotinic and muscarinic receptors of the rat adrenal medullary cells in the secretion of catecholamines evoked by exogenous and endogenous acetylcholine , ( 2 ) to know whether the ratio of epinephrine to norepinephrine in the perfusate of the adrenal gland stimulated with various agents was comparable and close to that in the adrenal medulla , and ( 3 ) to study the effect of tetrodotoxin on the secretion of catecholamine evoked by nicotine and muscarine .
C0014563
epinephrine
C0028351
norepinephrine