Biology · Human Physiology
A preterm newborn delivered at 30 weeks of gestation develops respiratory distress within 3 hours of birth. The infant has nasal flaring, intercostal retractions, tachypnea, grunting, and laboratory findings show metabolic acidosis. Antenatal records reveal that the mother did not receive steroid therapy. Which underlying mechanism best explains this newborn's condition?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Deficiency of pulmonary surfactant leading to alveolar collapse✓
- 2Congenital malformation of the airway
- 3Delayed clearance of fetal lung fluid
- 4Failure of oxygen transport due to fetal anemia
Correct answer
Deficiency of pulmonary surfactant leading to alveolar collapse
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