| Adrenergic Receptor |
Article Index for Adrenergic |
Information AboutAdrenergic Receptor |
| CATEGORIES ABOUT ADRENERGIC RECEPTOR | |
| g protein coupled receptors | |
|
]] The adrenergic receptors (or '''adrenoceptors''') are a class of G Protein-coupled Receptor s that are targets of the Catecholamine s. Adrenergic Receptor s specifically bind their Endogenous Ligand s, the catecholamines Adrenaline and Noradrenaline (called Epinephrine and Norepinephrine in the USA ), and are activated by these. Many cells possess these receptors, and the binding of an Agonist will generally cause the cell to respond in a Fight-or-flight manner. For instance, the Heart Rate will increase and the Pupil s will dilate, energy will be mobilized, and blood flow diverted from other organs to Skeletal Muscle .(Note: Sympathetic activity will result in vasoDILATION of coronary arteries via the Beta-2 adrenergic receptors.) SUBTYPES OF ADRENERGIC RECEPTORS There are several types of adrenergic receptors, but there are two main groups: α-Adrenergic and β-Adrenergic.
COMPARISON The absence of "ADRA1C" is intentional. At one time, there was a subtype known as C, but was found to be one of the previously discovered subtypes. To avoid confusion, it was decided that there would never be a C subtype again and so if any new subtypes were discovered, naming would start with D. DIAGRAMS SEE ALSO REFERENCES EXTERNAL LINKS
|
|
|