Binds to the same receptor site and is an agent or drug, it becomes another agent but produces an opposite effect. Example drug x binds to receptor site A and potentiates the release of a neurotransmitter, drug X is an agonist at that receptor site.inds to the same receptor site and is an agent or drug, it becomes another agent but produces an opposite effect. Example drug x binds to receptor site A and potentiates the release of a neurotransmitter, drug X is an agonist at that receptor site.
Athens, one of the worldâs oldest cities, has a history of over 3000 years. Details of its founding, though, are not known; the rich mythology of ancient Greeks, though, fills in the blanks. According to the legend, Cecrops was the founder and first King of Athens.
In 559 BC, Cambyses I the Elder was succeeded as the king of AnÅ¡Än by his son Cyrus the Great, who also succeeded the still-living Arsames as the King of Persia, thus reuniting the two realms. Cyrus is considered to be the first true king of the Persian Empire, as his predecessors were subservient to the Medes.