Chapter 17: The Respiratory System
Which of the following components increase(s) as a proportion of the respiratory tract wall from trachea to alveoli?
Air moving rapidly across the vocal cords and causing them to vibrate and produce sound is contacting what type of epithelium?
a. Pseudostratified ciliated
b. Stratified squamous keratinized
c. Stratified squamous nonkeratinized
Which structural feature distinguishes between terminal and respiratory bronchioles?
c. Exocrine bronchiolar cells
d. Mucous glands in lamina propria
Which of the following features distinguishes a bronchus within a lung from the primary bronchi?
a. Glands in the submucosa
b. Pseudostratified ciliated columnar epithelium
c. Smooth muscle in the wall
d. Irregular plates of cartilage
e. Goblet cells in the epithelium
Which feature involved in protection of the respiratory tract is absent from the digestive tract?
Which of the following is true of pulmonary surfactant?
a. Secreted by type I pneumocytes
b. Forms layer rich in phospholipid overlying a thin aqueous phase
c. Prevents alveolar collapse by increasing surface tension
d. Does not affect bacterial survival
e. Is secreted by goblet cells
The pulmonary (functional) and bronchial (nutritive) arterial systems enter the lungs separately at the hilus but anastomose into ...