Definition of fatalism for English Language Learners : the belief that what will happen has already been decided and cannot be changed Learn More about fatalism
The receptors most relevant to the pharmacology of vasopressors are adrenoceptors. Adrenoceptors, sometimes referred to as adrenergic receptors, interact with norepinephrine, epinephrine, and chemically similar drugs (called adrenomimetic, adrenergic, or sympathomimetic agents).
The main categories of adrenergic receptors relevant to vasopressor activity are the alpha-1, beta-1, and beta-2 adrenergic receptors, as well as the dopamine receptors [2,3]. 1  Alpha adrenergic â Activation of alpha-1 adrenergic receptors, located in vascular walls, induces significant vasoconstriction.