Which statement regarding pulmonary surfactant is incorrect?

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Type II alveolar cells produce itIt is composed of lecithin and sphingomyelinIt raises the surface tension within the alveoliIt helps stop smaller alveoli from collapsingIt reduces the effort required for lung expansion

Explanation

Pulmonary surfactant is secreted by Type II alveolar cells and contains phospholipids such as lecithin and sphingomyelin. Its primary function is to lower surface tension in the alveoli, thereby preventing the collapse of smaller air sacs and facilitating easier lung inflation. Therefore, the statement that it increases surface tension is false.