Epinephrine increases blood pressure and relieves bronchospasm by stimulating which response?

Epinephrine primarily stimulates the sympathetic response in the body. When epinephrine is released—especially in emergency situations, such as anaphylactic shock or severe asthma attacks—it acts on adrenergic receptors, which are part of the sympathetic nervous system. This stimulation leads to several physiological effects: it increases heart rate and contractility (which raises blood pressure), dilates the bronchioles in the lungs (relieving bronchospasm), and increases blood flow to muscles.

The sympathetic response is often associated with the body's "fight or flight" mechanisms, preparing the body to respond to stress or danger effectively. This includes increased alertness, heightened energy levels, and improved airway function, all critical in emergency medical situations. By understanding the role of epinephrine in activating the sympathetic nervous system, EMTs can utilize this information to effectively manage conditions related to bronchospasm and hypotension.