Mastering Respiratory Flashcards
Gas exchange between the lungs and the atmosphere occurs in the __________.
Alveoli
What is a function of the pleural fluid?
To hold the lungs to the thoracic wall
The CFTR channel is an anion channel that is dysfunctional in patients with cystic fibrosis. It is required for the proper production of mucus in the respiratory tract. Which anion moves through the CFTR channel?
Chloride
What would the pressure of a gas become if its starting pressure was 6 mmHg in a volume of 30 L, and the volume decreased to 5 L?
36 mmHg
As one moves up in altitude, the atmospheric pressure decreases. In Vail, Colorado (altitude 8022 ft or 2445 m), the atmospheric pressure is approximately 570 mmHg. What would the partial pressure of oxygen be in Vail?
120 mm Hg
The additional air that you can exhale after a normal exhale is the __________.
expiratory reserve volume
What causes normal expiration?
Elastic recoil of lungs and the thoracic cage
A patient with an allergy has an EpiPen. Which would you expect after injection of epinephrine?
Decreased resistance and increased flow
A student is biking to class and crashes. A broken rib makes a hole in the plural membrane. Which do you expect?
More air in the pleural cavity and increased intrapleural pressure
Which is the best definition of anatomical dead space?
The volume of the conducting system
