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Which alveolar cells are macrophages?  A. Type I B. Type II C. Type III D. Type IV

The mucus blanket is produced by: A. Pores of Kohn B. Lymphatic system C. Macrophages D. Goblet cells

Match the partial pressure of the following gases:  

The area where most gas exchange occur in the interstitium is termed: A. tight space B. loose space C.  tight and loose space D. none of the above  

At higher elevations, there is less air pushing down from above, which allows the air molecules to move further away. This term is referred to as ________________.

Which structures are contained in the mediastinum? (Select all that apply)I. Trachea II. Great vessels III. HeartIV. Pituitary gland 

___________ refers to the study of forces in action. A. Static B. Resistance C. Combustion D. Dynamic

During exhalation, the intra-alveolar pressure decreases toward atmospheric pressure and allows the elastic properties of the lungs to return to their normal resting level.

What is the term for the cartilaginous airways?     a.   respiratory unit     b.   acinus     c.   conducting zone     d.   tracheobronchial tree 

Efforts to regulate the economy through the manipulation of the supply of money and credit are known as