Question

Which of the following is a component of the respiratory membrane?

• A. Plasma membrane of the alveolar cell
• B. Plasma membrane of the capillary endothelial cell
• C. Fused basal laminae of the alveolar and the capillary endothelial cell
• D. All of the above are members of the respiratory membrane

Answer 1

The correct option is D

All of the above are members of the respiratory membrane

This respiratory surface, also known as the respiratory membrane, includes the alveolar epithelial cells as well as the pulmonary capillary endothelial cells. Gas exchange occurs across this membrane and is diffusion of oxygen into and carbon dioxide out of the blood.