Skip to Main Content

++

Chapter 15. Toxic Responses of the Respiratory System

++
++
++

Which of the following statements is FALSE regarding the role of mucus in the conducting airways?

+
+
++

a. Pollutants trapped by mucus can be eliminated via expectoration or swallowing.

+
++

b. Mucus is of a basic pH.

+
++

c. The beating of cilia propels mucus out of the lungs.

+
++

d. Mucus plays a role promoting oxidative stress.

+
++

e. Free radical scavenging is believed to be a role of mucus.

++
++
++

Respiratory distress syndrome sometimes affects premature neonates due to lack of surfactant production by which of the following cell types?

+
+
++

a. lung fibroblasts.

+
++

b. type II pneumocytes.

+
++

c. endothelial cells.

+
++

d. alveolar macrophages.

+
++

e. type I pneumocytes.

++
++
++

In a situation where there is an increased metabolic demand for oxygen, which of the following volume measurements will greatly increase?

+
+
++

a. total lung capacity (TLC).

+
++

b. residual volume (RV).

+
++

c. functional residual capacity (FRC).

+
++

d. tidal volume (TV).

+
++

e. vital capacity (VC).

++
++
++

The free radicals that inflict oxidative damage on the lungs are generated by all of the following EXCEPT:

+
+
++

a. tobacco smoke.

+
++

b. neutrophils.

+
++

c. ozone.

+
++

d. monocytes.

+
++

e. SO2.

++
++
++

Which of the following gases would most likely pass all the way through the respiratory tract and diffuse into the pulmonary blood supply?

+
+
++

a. O3 (ozone).

+
++

b. NO2.

+
++

c. H2O.

+
++

d. CO.

+
++

e. SO2.

++
++
++

All of the following statements regarding particle deposition and clearance are true EXCEPT:

+
+
++

a. One of the main modes of particle clearance is via mucociliary escalation.

+
++

b. Diffusion is important in the deposition of particles in the bronchial regions.

+
++

c. Larger volumes of inspired air increase particle deposition in the airways.

+
++

d. Sedimentation results in deposition in the bronchioles.

...

Pop-up div Successfully Displayed

This div only appears when the trigger link is hovered over. Otherwise it is hidden from view.