Question

The respiratory membrane is a combination of ________.

• A. Respiratory bronchioles and alveolar ducts
• B. Alveolar and capillary walls and their fused basement membranes
• C. Atria and alveolar sacs
• D. Respiratory bronchioles and alveolar sacs

Answer 1

The correct option is B

Alveolar and capillary walls and their fused basement membranes

The respiratory membrane, also called the respiratory surface, is made of the alveolar epithelial cell and the pulmonary capillary endothelial cell, and this structure helps exchange the gases carbon dioxide and oxygen. The respiratory membrane plays a key role in exchanging gases within the lungs. This membrane helps bring oxygen into the blood and remove carbon dioxide.