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. Cough reflex- this reflex expels irritants or foreign particles from the airway.
B. Babinski reflex- neurological reflex involving foot dorsiflexion.
C. Withdraw reflex- somatic reflex for pain, not respiratory.
D. Baroreceptor reflex- involved in blood pressure regulation.
Correct Answer is D
Explanation
A. Grapelike sacs located very close to pulmonary capillaries: This correctly describes the structure of alveoli.
B. Located within the lungs: Alveoli are indeed located in the lungs.
C. Primarily concerned with gas exchange: Alveoli are the main site of gas exchange in the lungs.
D. Contain smooth muscle: Alveoli do not contain smooth muscle; this is a feature of bronchi and bronchioles.
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