Pulmonary surfactant reducing surface tension in the alveoli is secreted by type:
AII alveolar
BIV alveolar
CVI alveolar
DIX alveolar
Answer & Solution
Correct answer: A. II alveolar
1. Type I cells are the thin gas exchange surface.
2. The other cell type has a secretory role.
3. Surfactant comes from type II alveolar cells.
_Source: OpenStax Anatomy and Physiology 2e, Chapter 22, The Respiratory System._
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