Air flow through the smaller bronchioles can be adjusted by varying the contractile activity of the smooth muscle within their walls.

Question

Quizplus · Accepted Answer

The smooth muscle within the walls of smaller bronchioles can contract or relax to adjust the airflow through them. This mechanism helps to regulate ventilation in the lungs, especially during exercise or other activities that require more oxygen delivery to the body tissues. The autonomic nervous system can control the smooth muscle tone of bronchioles, depending on the oxygen and carbon dioxide levels in the body, as well as other physiological factors.

Air Flow Through the Smaller Bronchioles Can Be Adjusted by Varying