Alpha-adrenergic receptors

Alpha-adrenergic receptors are proteins found on the surface of certain cells in the body that respond to hormones like adrenaline (epinephrine). When these receptors are activated, they help regulate various functions such as blood vessel constriction, which raises blood pressure, and smooth muscle relaxation, which can affect digestion. There are two main types: alpha-1, which primarily causes blood vessel tightening, and alpha-2, which can inhibit neurotransmitter release. These receptors play a crucial role in the body's "fight or flight" response and are also important in treating conditions like high blood pressure and certain hormonal disorders.