Lungs (bronchioles), blood vessels, and various organs.
These receptors promote relaxation. They dilate the airways to help you breathe easier and widen blood vessels (vasodilation) to improve flow. Beta-3 ($\beta$3) Receptors: The Metabolic Manager beta receptor
Understanding Beta Receptors: The Body's Precision Switches When you experience a "fight or flight" rush, your body isn't just reacting randomly. It is using a sophisticated system of biological locks and keys. Among the most critical "locks" are (also known as beta-adrenergic receptors). These G protein-coupled receptors are scattered throughout your body, translating hormonal signals like adrenaline into physical action. Lungs (bronchioles), blood vessels, and various organs
Primarily found in fat tissue (adipose) and the bladder. In the kidneys
Beta2-Receptor Agonists and Antagonists - StatPearls - NCBI - NIH
When stimulated, they increase heart rate and the strength of each beat. In the kidneys, they trigger the release of renin to help regulate blood pressure. Beta-2 ($\beta$2) Receptors: The Great Relaxer