Which of the following is NOT part of the small intestine? 

Which lung pressure keeps the lungs from collapsing? 

Which of the following is the most powerful respiratory stimulant? 

Which of the following describes the ability of the blood to carry more oxygen as a result of being at a higher altitude?  

What two factors must be coupled for efficient gas exchange? 

Which of the following would happen if respiratory rate increased? 

What correctly describes the function of cilia AND mucus? 

How is carbon dioxide transported in the blood? 

Match the respiratory diseases with their descriptions.

Which of the following is a normal breathing rate for a typical healthy adult?