0 a muscle that moves a part of the body by contracting (= becoming shorter) --
1 a substance that combines with a receptor and causes a change or reaction in the body: --
a dopamine agonist
2 a protagonist --
The drugs can be either partial chemokines or small peptides that behave as receptor antagonists or agonists.
Furthermore, no significant current were evoked by n-acetylcholine-receptor agonists epibatidine and methylcarbamylcholine.
Experiments using adrenergic agonists and antagonists allowed us to determine that the metabolic effect of adrenaline is caused by interaction with 2-receptors.
Two overlapping conformations were found that all of seven active agonists had in common.
They did not attempt to determine if these agonists acted on one or multiple glutamate receptors.
When antagonists were used, these were co-applied with the agonists and ejected from the same barrel.
The agonists used in this study varied in their selectivity for each receptor type.
When selective a2 or b agonists were used instead of epinephrine, consistent modulation effects were observed.
