TYK160

Which of the following statements about lung development is NOT correct?

a) The increase in the number of alveoli exceeds the increase in size of alveoli during the first decade of life.

b) Surfactant production by Type II pneumocytes begins at around 20 weeks of gestation.

c) The first breath of life generates positive inspiratory pressures up to 70-100 cmH2O and helps expel water from the lungs.

d) Alveolar size continues to increase until adulthood.

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Answer

Answer c.

The first breath following birth creates excessive negative inspiratory force which allows air to enter the lungs, overcoming the high airway resistance at birth. The remainder of the statements are correct.

Notes

This question originally printed in the Pediatric Anesthesiology Review Topics kindle book series, and appears courtesy of Naerthwyn Press, LLC.

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