The neonatal ICU nurse is aware that type II alveolar cells produce surfactant, and they usually develop at how many weeks of gestation?
A)
17 to 18 weeks
B)
19 to 20 weeks
C)
24 to 28 weeks
D)
34 to 38 weeks
Ans:
C
Feedback:
Type II alveolar cells begin to develop at approximately 24 weeks. These cells produce surfactant, a substance capable of lowering the surface tension of the air-alveoli interface. By the 28th to 30th week, sufficient amounts of surfactant are available to prevent alveolar collapse when breathing begins.
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