Which of the following statements concerning pulmonary surfactant is incorrect?
A)It is secreted by Type II alveolar cells.
B)It is deficient in newborn respiratory distress syndrome.
C)It promotes elastic recoil of the lungs.
D)It reduces the cohesive force between water molecules.
E)It reduces surface tension.

Question

Quizplus · Accepted Answer

Pulmonary surfactant is a mixture of lipids and proteins that reduces the surface tension at the air-liquid interface in the lungs, preventing alveolar collapse. It is secreted by Type II alveolar cells and is deficient in newborn respiratory distress syndrome. Pulmonary surfactant reduces the cohesive force between water molecules, which helps to reduce surface tension, but it does not promote elastic recoil of the lungs. In fact, pulmonary surfactant allows the lungs to be more compliant, or stretchy, by reducing surface tension and preventing alveolar collapse.

Which of the Following Statements Concerning Pulmonary Surfactant Is Incorrect