Final answer:
The mechanism of action of salmeterol in the treatment of asthma is through its activation of the beta-2 adrenergic receptors, which leads to bronchodilation and improved airflow in the lungs.
Step-by-step explanation:
The mechanism of action of salmeterol (Serevent) in the treatment of asthma is through its activation of the beta-2 adrenergic receptors in the smooth muscles of the bronchi. Salmeterol is a long-acting beta-2 agonist, which means it stimulates these receptors to relax the smooth muscles and dilate the bronchi, allowing for increased airflow in the lungs.
This bronchodilation helps to relieve the symptoms of asthma by opening up the restricted air passages and making breathing easier. It also helps to prevent asthma attacks by maintaining the dilated airways for a longer duration.
Overall, salmeterol works to improve respiratory function and provide long-term control of asthma symptoms when used as part of a comprehensive asthma treatment plan.