Air flow and blood flow are governed by the same principles: flow occurs when pressure gradients can overcome resistance. And like in the cardiovascular system, resistance to airflow is almost entirely altered by changes in diameter of the conduits (in the case of the respiratory system, these important conduits are the bronchioles). What would happen to airflow into an alveolus when the bronchiole serving that alveolus constricts?
Airflow would increase into the alveolus
Airflow would decrease into the alveolus