Question

multiple choice question
the respiratory membrane consists of an endothelial cell of a capillary and the plasma membrane of an alveolar type ———— cell.
o 2
o 1
o b
o a

Explanation:

The respiratory membrane is crucial for gas exchange. Alveolar type 1 cells are thin and spread out, forming a large surface area for efficient gas diffusion. The endothelial cell of a capillary and the plasma membrane of an alveolar type 1 cell together make up the respiratory membrane. Alveolar type 2 cells secrete surfactant, while options B and A are not standard numbering for alveolar cell types in this context.

Answer:

1