Which of the following is true for receptor action of the drug
An antagonist has both an intrinsic activity and affinity for receptor
An antagonist has the affinity but no intrinsic activity for the receptor
A paial antagonist has no affinity or intrinsic activity for the receptor
Intrinsic action and affinity are not impotant for drug action
Ref-KDT 6/e p41 Intrinsic activity is a measure of the ability of a drug that is bound to the receptor to generate an activating stimulus and produce a change in cellular activity. Both agonists and antagonists can bind to a receptor.
General anatomy