Variation in the diameter of the bronchioles controls what function?
a. resistance to air flow and the ventilation in the lungs
b. ability to expel air forcefully in a cough
c. the level of oxygen exchange
d. expulsion of air from the lungs through the larynx during speech
Answer: a. resistance to air flow and the ventilation in the lungs.
The diameter of the bronchiles controls resistance to air flow and the ventilation in the lungs. the pressure change within the lungs is what forces air in and out of the lungs for inhalation and exhalation.