Question

lo 4.2. what is the function of smooth muscle in bronchioles?
regulate airflow by contracting and relaxing
aid in digestion by breaking down food particles
produce hormones to regulate metabolism
secrete mucus to trap pathogens
produce antibodies to fight infections

Explanation:

Smooth muscle in bronchioles contracts and relaxes to adjust the diameter of the airways. This adjustment controls the amount of air flowing into and out of the lungs. Digestion is related to the digestive system, hormones are produced by endocrine glands, mucus - secreting cells (not smooth muscle) trap pathogens, and antibodies are produced by immune cells (like B - cells).

Answer:

Regulate airflow by contracting and relaxing