Answer:
Phagocytic defense in the normal lung is shared principally by two kinds of cells - alveolar macrophages that reside on the air surface and roam the alveoli and PMNs that circulate in the intravascular space or are stored transiently in areas adjacent to the capillary-alveolar interface (marginated in capillaries) 
Explanation:
mark brainliest pls
 
        
             
        
        
        
Depolarization is initiated when there is an influx of sodium inside the cell as opposed to repolarization, where potassium exits the cell (occurring after Na+ gates close). Remember that for every 3 Na+ in, there is 2 K+ out. This imbalance helps to stabilize the membrane.
        
             
        
        
        
I may be wrong but maybe oil
        
             
        
        
        
B cytoplasm passes light threw the eye
        
             
        
        
        
Answer:
it benefits the thing or area it lives on?