A 12-year-old boy was recently diagnosed with asthma, and his primary care provider has prescribed a corticosteroid to be administered by metered-dose inhaler. This drug achieves a therapeutic effect by which of the following means?
A) By increasing the number of beta-adrenergic receptors
B) By increasing the muscle tone in the smooth muscle of the trachea
C) By increasing the permeability of the alveolar membrane
D) By increasing the number of binding sites on erythrocytes
A
Feedback:
Corticosteroids increase the number of beta-adrenergic receptors and increase or restore responsiveness of beta receptors to beta-adrenergic bronchodilating drugs. They do not influence the permeability of alveoli, muscle tone, or the structure of red blood cells.
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What age is the child who is in the "do it myself" stage?
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