At the time of inspiration, _____ takes place.

Human lungs are made up of _____

Which one of the following does not consist diffusion membrane?

What is the primary site for exchange of gases in lungs?

On which of the following factors diffusion does not depend?

Solubility of carbon dioxide is ____ than oxygen.

Pneumotaxic centre is located in ____

Which of the following diseases can be found in workers working in a mill?