Apparent authority can legally be found, even if actual authority has not been given. There must be some act or some knowing omission on the part of the principal-if the agent alone acts to give the third party this false impression, then the principal is not bound.
An endogenous agonist for a particular receptor is a compound naturally produced by the body that binds to and activates that receptor. For example, the endogenous agonist for serotonin receptors is serotonin, and the endogenous agonist for dopamine receptors is dopamine. Full agonists bind to and activate a receptor with the maximum response that an agonist can elicit at the receptor. One example of a drug that can act as a full agonist is isoproterenol, which mimics the action of adrenaline at Î² adrenoreceptors.
An antagonist is an agent that binds to a receptor but does not elicit the response that the neurotransmitter or an agonist would cause. The antagonist blocks the receptor and prevemts activation by neurotransmitters or other drugs.So in the case of opiates, lets look at the opiate agonist, morphine.When morphine enters the brain, it binds to opiate receptors and activates them. This binding is what produces the effects of Morphine.o in the case of opiates, lets look at the opiate agonist, morphine. When morphine enters the brain, it binds to opiate receptors and activates them. This binding is what produces the effects of Morphine.