The last passageway of the conducting portion of the respiratory tract is called the
A)terminal bronchiole.
B)alveolar duct.
C)respiratory bronchiole.
D)alveolus.
E)air sac.

Question

Quizplus · Accepted Answer

The conducting portion of the respiratory tract includes the nasal cavity, pharynx, larynx, trachea, bronchi, and bronchioles. The terminal bronchioles are the smallest airways that are still part of the conducting portion, and they are the last passageway before air enters the respiratory portion of the lung where gas exchange occurs. Alveolar ducts, respiratory bronchioles, alveoli, and air sacs are all part of the respiratory portion of the lung where gas exchange occurs, and are not part of the conducting portion.

The Last Passageway of the Conducting Portion of the Respiratory