Question

Choose the most appropriate combination of components of respiratory membrane, from the following.

• A. Alveolar wall and ducts.
• B. Inner and outer pleural membranes and pleural fluid.
• C. Membranes of alveolar ducts and capillaries.
• D. Alveolar wall, alveolar capillary and interstitial space.

Answer 1

The correct option is D Alveolar wall, alveolar capillary and interstitial space.

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