Gas Exchange

Gas Exchange

Multiple Choice

What is the function of small amount of fluid in the lungs ?

• To prevent friction of the movement in the lungs

• Expand surface area

Multiple Choice

What is the function of elastic fibres in alveolus wall ?

• stretch during exhalation

• trap the small particles

Multiple Choice

What is the function of collagen in alveolus ?

• Attack pathogen

• prevent from bursting

Multiple Choice

The mechanism of oxygen diffusion in alveoli ?

• HIgher concentration of oxygen in alveolus diffuse out to the blood

• Higher concentration of carbon dioxide in alveolus diffuse out to the blood

Multiple Choice

Bronchioles are surrounded by

• smooth muscles

• bone