Agonists

Agonists:
Agonists activate receptors.
After agonists bind to receptor  release of chemical energy  chain of biochemical events in cell  response.

Efficacy of agonist:
1) Full agonists – have a high efficacy  produce maximum response while only occupying some receptors
2) Partial agonists – have a low efficacy  do not produce a maximum response even when they occupy all receptors