Which of the following becomes more abundant deeper into the conducting zone (from bronchi to bronchioles)?

Question

Quizplus · Accepted Answer

As the airways progress from the bronchi to the bronchioles, the amount of cartilage decreases and eventually disappears, while the amount of smooth muscle increases. This allows for greater control of airway resistance and airflow through the bronchioles by regulating the diameter of these airways.

Which of the Following Becomes More Abundant Deeper into the Conducting