Final answer:
Epinephrine acts as a beta2 agonist to cause bronchodilation and decrease release of inflammatory mediators. Its alpha1 agonist effect reduces upper airway edema.
Step-by-step explanation:
Epinephrine acts as a beta2 agonist to cause bronchodilation and decrease release of inflammatory mediators. On the other hand, it acts as an alpha1 agonist to reduce upper airway edema.