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

This is the membrane across which the diffusion of the gases takes place, from the alveoli into the blood and from the blood into the alveoli.