Respiratory system questions

Bronchodilators are a class of drug often used in the treatment of asthma and COPD, which act on β-adrenergic receptors of the airways to induce smooth muscle relaxation. The anatomic distribution of these receptors is closely correlated to the function of each structural component of the lungs. What structural component(s) of the airway would be most affected by the use of a bronchodilator, and in what functional zone(s) are they found?

(Choice A)
Lobar bronchi and alveoli would be affected equally, and they are both found in the respiratory zone
(Choice B)
Lobar bronchi and alveoli would be affected equally, and they are found in the conducting and respiratory zones respectively
(Choice C)
Lobar bronchi, which are found in the conducting zone
(Choice D)
Alveoli, which are found in the respiratory zone

MCAT

Kurs: MCAT > Rozdział 7

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