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Human Body & Health

In an asthmatic patient experiencing acute bronchospasm after exposure to pollen, which mechanism explains why administering a beta-agonist inhaler might not fully resolve the respiratory distress?

A)Epinephrine inhibits immune cell activation.
B)Tachycardia reverses histamine receptor agonism.
C)Leukotrienes block beta-agonist binding sites.
D)Mast cells release multiple inflammatory mediators.

💡 Explanation

Beta-agonists primarily relax bronchial smooth muscle; however, because mast cells release histamine, leukotrienes, and other inflammatory mediators during an allergic reaction, beta-agonists alone may not fully counteract all bronchoconstrictive effects. Therefore, addressing histamine's effects is necessary, rather than relying solely on beta-agonists.

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