Beta adrenergic receptors are a class of G-protein-coupled receptors that are sensitive to the catecholamines, particularly epinephrine and norepinephrine. They play a crucial role in the regulation of various physiological processes such as heart rate, smooth muscle relaxation, and metabolic activities. These receptors are divided into three main subtypes: β1, β2, and β3, each with distinct tissue distribution and functional roles.
