β2-adrenergic receptor

The β2-adrenergic receptor is a specialized protein found on certain cells in your body, especially in the lungs, muscles, and blood vessels. It acts like a switch that responds to signals from hormones like adrenaline. When activated, it causes smooth muscles to relax, leading to effects such as opening the airways for easier breathing during stress or exercise. This receptor also influences blood flow and other functions. Medications like inhalers for asthma target these receptors to help open airways and improve breathing. Overall, β2-adrenergic receptors play a vital role in the body's fight-or-flight response by regulating muscle relaxation and blood flow.