Beta-adrenergic agonists or Beta-agonists are medications that relax muscles of the airways, which widens the airways and results in easier breathing.They are a class of sympathomimetic agents which act upon the beta adrenoceptors. In general, pure beta-adrenergic agonists have the opposite function of beta blockers.ost agonists of the beta receptors are selective for one or more beta-adrenoreceptors. For example, patients with low heart rate are given beta agonist treatments that are more cardio-selective such as dobutamine, which increases the force of contraction of the heart muscle.
A character is a person presented in a dramatic or narrative work, and characterization is the process by which a writer makes that character seem real to the reader. A hero or heroine, often called the protagonist, is the central character who engages the readerâs interest and empathy. The antagonist is the character, force, or collection of forces that stands directly opposed to the protagonist and gives rise to the conflict of the story.
A protagonist (from Ancient Greek ÏÏÏÏÎ±Î³ÏÎ½Î¹ÏÏÎ®Ï (protagonistes), meaning 'player of the first part, (chief actor)' is the main character in any story, such as a literary work or drama. The protagonist is at the center of the story, makes the key decisions, and experiences the consequences of those decisions. The protagonist affects the main characters' circumstances as well, as they are often the primary actor propelling the story forward. If a story contains a subplot, or is a narrative made up of several stories, then the character who is interpreted as the protagonist of each subplot or individual story.