Answer to Question 1
C
Explanation: A) The pleura is a normal anatomic structure.
B) A cough does not affect the CO2 level.
C) Correct ABG stands for arterial blood gases. Hypercapnia is a very high level of carbon dioxide in the arterial blood.
D) Exhalation is a normal breathing out.
Answer to Question 2
A
Explanation: A) Correct URI means upper respiratory infection.
B) The bronchi are not part of the upper respiratory tract.
C) The lungs are not part of the upper respiratory tract.
D) The lungs are not part of the upper respiratory tract.