the classical single receptor competitive occupancy model accurately describes the joint action of an agonist ( isoprenaline ) and a beta-adrenoceptor antagonist ( propranolol ) or some partial agonists ( dichlorisoprenaline , practolol ) on the positive chronotropic response in rats which have been depleted of catacholamines .
C0022245
isoprenaline
C1372804
positive chronotropic