title: The relationship of receptor reserve and agonist efficacy to the sensitivity of alpha-adrenoceptor-mediated vasopressor responses to inhibition by calcium channel antagonists.
mesh_terms: D000316:Adrenergic alpha-Agonists / Q000494:pharmacology*; D000818:Animals; D002118:Calcium / Q000378:metabolism; D002121:Calcium Channel Blockers / Q000494:pharmacology*; D011942:Receptors, Adrenergic, alpha / Q000032:analysis / Q000187:drug effects / Q000502:physiology*; D014661:Vasoconstriction / Q000187:drug effects*
chemical_list: D000316:Adrenergic alpha-Agonists; D002121:Calcium Channel Blockers; D011942:Receptors, Adrenergic, alpha; D002118:Calcium