KROK 1 2010 – Question 165 · KROK (Medicine) · Physiology
Lungs of a preterm infant have areas of atelectasis (pulmonary collapse). The main cause is:
- A. Underdeveloped inspiration muscles
- B. Surfactant excess
- C. Diminished force of surface tension of lungs
- D. Surfactant deficiency
- E. Increased viscous resistance
Hint
Ask what normally keeps small alveoli from collapsing at the end of expiration and what is likely to be missing in an immature lung.
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