Epinephrine exerts its effects on the body by interacting with alpha and beta receptors. On alpha receptors, primarily alpha-1, it causes vasoconstriction, which increases blood pressure by narrowing the blood vessels. When binding to beta-1 receptors, epinephrine stimulates the heart, leading to an increased heart rate and enhanced contractility, thereby boosting cardiac output. Additionally, on beta-2 receptors, it induces bronchodilation and vasodilation, relaxing the smooth muscles of the bronchi and blood vessels, which improves airflow and reduces resistance in peripheral blood vessels.
Be great,
Evan, The Paramedic Coach
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