Question

Rate of diffusion of $C{O}_2$ is $20$ times higher than $O_2$, as it depends upon?

• A. Solubility of gases
• B. Partial pressure
• C. Thickness of membrane
• D. All of these

Answer 1

Answer: (D)

All of these

Gas exchange is the process that occurs between oxygen and carbon dioxide. Oxygen is passed from the lungs to the bloodstream and carbon dioxide is eliminated from the bloodstream to the lungs. Exchange of Gas takes place in lungs between the alveoli and capillaries which are tiny blood vessels, placed at the walls of alveoli. The rate of diffusion depends on the thickness of the biological membrane which forms the boundary between the external environment and organisms.

Gas exchange takes place by simple diffusion based on a concentration/pressure gradient. The rate of diffusion depends not only on the solubility of gases but also on the thickness of the membranes involved in gas exchange.

So the correct answer is 'All of these'.