Medical Quiz

Topics: Anatomy & Physiology: Respiratory Quiz

___ is a substance secreted by cells of the alveoli that reduces surface tension of the fluid around the alveoli, preventing collapse of the alveoli.

A. Mucosa

B. Pleural fluid

C. Both “surfactant” and “pleural fluid” are correct

D. Surfactant

Select your answer:
     


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The driving force regulating breathing is ________.

A. blood O2 levels

B. blood glucose levels

C. blood CO2 levels

D. Both “blood CO2 levels” and “blood O2” levels.