In the absence of surfactants:
It is difficult to keep the alveoli open
Bronchioles relax
The alveoli fill with water
Air enters the intrapleural space
The Correct Answer is A
A. It is difficult to keep the alveoli open- surfactant reduces alveolar surface tension; without it, alveoli collapse (atelectasis).
B. Bronchioles relax- not directly related to surfactant.
C. The alveoli fill with water- surfactant prevents collapse, not water entry.
D. Air enters the intrapleural space- this would cause a pneumothorax, unrelated to surfactant function.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. CO₂: High CO₂ (hypercapnia) stimulates the respiratory center to increase breathing.
B. Volume: Blood volume doesn't directly affect respiratory rate.
C. Bilirubin: This is associated with liver function and jaundice, not respiration.
D. Calcium: Calcium levels affect muscle function, not the breathing rate directly.
Correct Answer is A
Explanation
A. Superior/upper right lobe: Label #1 is at the top part of the right lung.
B. Inferior/lower right lobe: The left lung is on the viewer’s right. The lower lobe of the left lung is positioned inferiorly (near the diaphragm) and would be closer to label #8.
C. Superior/upper left lobe: The left lung has only two lobes: superior and inferior. The superior lobe of the left lung would be in the corresponding location to label #6.
D. Middle right lobe: The middle lobe is only present in the right lung and lies below the superior lobe but above the inferior lobe.
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