although the in vitro addition of adrenaline to platelet rich plasma causes a beta-adrenoceptor mediated inhibition of platelet aggregation in the rat , the simulation seen after chronic adrenaline exposure in vivo , which is associated with decreases in both basal and stimulated c-amp levels , suggests a functional preponderance of alpha-adrenoceptors over beta-adrenoceptors on the rat platelets .
C0034783
adrenoceptor
C0001643
beta-adrenoceptors