The diameter of bronchioles can change because their walls contain ________.
A) smooth muscle
B) skeletal muscle
C) fibrous cartilage
D) hyaline cartilage
E) elastic cartilage

Question

Quizplus · Accepted Answer

The walls of bronchioles contain smooth muscle, which allows their diameter to change in response to various stimuli, such as autonomic nervous system signals, to regulate airflow resistance and distribution in the lungs.

The Diameter of Bronchioles Can Change Because Their Walls Contain