Epinephrine is referred to as adrenaline and causes which effects?

Epinephrine is referred to as adrenaline and causes which effects?

• A. Vasoconstriction and bronchodilation
• B. Vasodilation and bronchoconstriction
• C. No effect
• D. Sedation

Answer: (A)

Epinephrine, also called adrenaline, acts on both alpha and beta adrenergic receptors. Stimulation of alpha-1 receptors causes vasoconstriction, tightening blood vessels and helping raise blood pressure while reducing airway mucosal edema. Stimulation of beta-2 receptors in the lungs leads to bronchodilation, opening the airways and easing breathing. This combination is exactly what’s needed in emergencies like severe allergic reactions, where it counters swelling and bronchospasm. The other options describe effects that are opposite or nonexistent for epinephrine, such as vasodilation with bronchoconstriction, no effect, or sedation.

Epinephrine, also called adrenaline, acts on both alpha and beta adrenergic receptors. Stimulation of alpha-1 receptors causes vasoconstriction, tightening blood vessels and helping raise blood pressure while reducing airway mucosal edema. Stimulation of beta-2 receptors in the lungs leads to bronchodilation, opening the airways and easing breathing. This combination is exactly what’s needed in emergencies like severe allergic reactions, where it counters swelling and bronchospasm. The other options describe effects that are opposite or nonexistent for epinephrine, such as vasodilation with bronchoconstriction, no effect, or sedation.