the relationship between alpha-adrenoceptor occupancy and vasoconstrictor response is more favorable for postsynaptic vascular alpha 1 adrenoceptors than for alpha 2 adrenoceptors in both arteries and veins , and there is evidence for a receptor reserve in alpha 1 adrenoceptors in both the arterial and venous circulation .
C0034784
alpha-adrenoceptor
C0001638
alpha 1