Which alveolar cells are macrophages?

Question

Quizplus · Accepted Answer

Type III alveolar cells are not an established classification in lung anatomy. The correct term for alveolar macrophages is not associated with a "type" designation like type I or type II pneumocytes. Alveolar macrophages are immune cells responsible for removing debris and pathogens in the alveoli, but they are not classified as Type III or any "type" based on the traditional nomenclature. The question seems to contain a factual error as it mislabels alveolar macrophages with a "type" designation. In standard respiratory physiology, Type I alveolar cells are involved in gas exchange, Type II alveolar cells secrete surfactant, and alveolar macrophages are part of the immune defense system without a "type" classification.

Which Alveolar Cells Are Macrophages