Question

O₂ is absorbed by the alveolar surface.

• A. True
• B. False

Answer 1

The correct option is A True

Diffusion of oxygen in alveolar walls:

1. Diffusion is defined as the process by which a molecule moves from a region of its higher concentration to a region of its lower concentration.
2. In the lungs, oxygen is absorbed from the air into the alveolar walls by the process of diffusion.
3. This oxygen then moves from the alveoli to the blood through the small blood vessels known as blood capillaries present in the alveolar walls.

Hence, the given statement is true