What Happens If Surfactant Was Not Present What Is The Role Of Surfactant In Respiration?

What is the role of surfactant in respiration? - what happens if surfactant was not present

In this the kind of laboratory of physiology .. Helping Hand!

1. What was the effect of reducing the radius of the air tube on the respiratory volumes?

2. What is the role of surfactant in breathing?

3. What happens if surfactant were not present?

4. What happens when a pneumothorax?

5. Why is it important to maintain intra-thoracic pressure less than atmospheric pressure?

Thank you!