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← Human Body & HealthA patient with asthma experiences bronchospasms. If a beta-2 adrenergic agonist inhaler is administered, which consequence follows regarding the airway smooth muscle?
A)Increased mast cell degranulation rate
B)Enhanced leukotriene receptor sensitivity
C)Relaxation via cAMP upregulation✓
D)Reduced histamine production rate
💡 Explanation
Beta-2 adrenergic agonists promote bronchodilation via smooth muscle relaxation. This occurs because the agonist binds to beta-2 receptors, stimulating cAMP production; therefore, smooth muscle relaxes. Rather than promoting degranulation or enhancing leukotriene sensitivity, agonists counteract those effects.
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