in an attempt to explain the previous electrophysiological data on the ontogeny of beta-adrenergic and muscarinic cholinergic interactions on cardiac ca2+ current , biochemical studies were performed on the ontogeny of beta-adrenoceptors , muscarinic cholinoceptors and ca2+ channels in cardiac muscle of developing rats : 16-20 days old foetuses , 0-20 days old neonates , and 2-3 months old adults .
C0018787
cardiac
C0027061
cardiac