Alpha 2-adrenergic agonist refers to a drug that reduces the activity of the neurotransmitter norepinephrine by stimulating certain receptors within the central nervous system (central presynaptic alpha 2-adrenergic receptors). The release of norepinephrine triggers action within the sympathetic nervous system. This part of the nervous system regulates certain involuntary activities during stress, such as increasing the heart rate, deepening breathing, and raising blood pressure. Norepinephrine also plays a role in regulating mood and emotion . The administration of Alpha 2-adrenergic agonists may result in a reduced heart rate and lowered blood pressure and have depressive or sedative effects.

Related Articles

Autonomic nervous system at psychology-glossary.com■■■■■■■
Autonomic nervous system refers to the the division of the peripheral nervous system that regulates the . . . Read More
MAOIs (Monoamine oxidase inhibitors) at psychology-glossary.com■■■■■■
MAOIs (Monoamine oxidase inhibitors) refer to the group of antidepressant drugs that inhibit the enzyme . . . Read More
Agonist at psychology-glossary.com■■■■■
Agonist refers to a drug that effectively mimics the action  of a natural chemical messenger within . . . Read More
Norepinephrine at psychology-glossary.com■■■■■
Norepinephrine refers to Neurotransmitter active in the central and peripheral nervous systems , controlling . . . Read More
Nicotine at psychology-glossary.com■■■■■
Nicotine refers to an alkaloid found in tobacco that, among other effects, stimulates certain acetylcholine . . . Read More
ACh (Acetylcholine) at psychology-glossary.com■■■■
- ACh (Acetylcholine) : - ACh (Acetylcholine ) : ACh is the short form of Acetylcholine which refers . . . Read More
Catecholamines at psychology-glossary.com■■■■
Catecholamines refer to organic compounds, including Epinephrine , Norepinephrine , and Dopamine . They . . . Read More
Autoreceptor at psychology-glossary.com■■■■
Autoreceptor refers to presynaptic receptor that is stimulated by the neurotransmitter released by the . . . Read More
Monoamine oxidase (MAO) inhibitors at psychology-glossary.com■■■■
Monoamine oxidase (MAO) inhibitors refers to drugs used to treat depressions that inhibit the activity . . . Read More
Alcohol at psychology-glossary.com■■■■
Alcohol is a central nervous system depressant.  It is an ethanol produced by the action of yeast on . . . Read More