the occupancy of adrenoceptors by noradrenaline ( na ) is a prerequisite for both desensitization of the system and the reduction in the number of beta-adrenoceptors while serotonin ( 5-ht ) is co-required with na for the regulation of the density of beta-adrenoceptors .
C0034783
adrenoceptors
C0001643
beta-adrenoceptors