Exam 23: The Respiratory System

List the cells found in, or associated with, the wall of an alveolus, stating the function of each one.

An examination of the wall of the airways in the bronchial tree from bronchi to alveoli would reveal that cartilage decreases in quantity and disappears, while the amount of smooth muscle increases.

The auditory (eustachian) tubes open into the _____ portion of the throat.

_____ neurons of the medullary rhythmicity area cause contraction of the diaphragm via signals sent through the _______ nerves.

Olfactory epithelium

Describe the lining tissue of the respiratory tract from the external nares (nostrils) to the beginning of the trachea. Relate the lining to the function of each area.

The two portions of the respiratory center in the pons are the pneumotaxic and rhythmicity areas.