Ephedrine and Clenbuterol belong to a class of stimulants known as _________.

Ephedrine and Clenbuterol are classified as B2-agonists, which specifically target the beta-2 adrenergic receptors in the body. These receptors are predominantly found in smooth muscle, including those in the lungs and vasculature, and their activation leads to effects such as bronchodilation and increased lipolysis. This makes B2-agonists beneficial in contexts such as treating asthma and for potential weight loss or performance enhancement in athletes by promoting fat oxidation and muscle growth.

B2-agonists are distinct from other types of agonists, such as B1-agonists, which primarily affect the heart and increase heart rate, or A1-agonists, which influence vasoconstriction. Therefore, the specific activity and applications of ephedrine and clenbuterol align closely with the actions associated with B2-adrenergic stimulation, confirming that their classification as B2-agonists is accurate and supported by their physiological effects.