Beta-adrenergic | Receptor

( -ARs) are a class of G protein-coupled receptors (GPCRs) that act as key molecular targets in the sympathetic nervous system, primarily activated by catecholamines like adrenaline and noradrenaline to manage "fight or flight" responses.

-ARs are key regulators in embryonic development. They modulate actomyosin relaxation, allowing epithelial tissues to stretch during body elongation, as detailed in Cell.com . 4. Summary of Subtype Characteristics Primary Location Key Physiological Effect β1beta sub 1 Heart, Adipose tissue Increases heart rate & contractility β2beta sub 2 Smooth muscle (Airways), Immune Cells Bronchodilation, Vasodilation β3beta sub 3 Adipose tissue, Urinary bladder Lipolysis, Thermogenesis beta-adrenergic receptor

Contrary to their primary role in the adult nervous system, β2beta sub 2 ( -ARs) are a class of G protein-coupled

-ARs are enriched in specialized zones with scaffold proteins (SAP97, AKAP79/150), while β2beta sub 2 Immune Cells Bronchodilation