They replace the lost ions by active uptake through active transport
of ions from the surrounding waters.  This is exhibited in freshwater fishes that
actively take in these ions through the gills.  Most of the ions involved in osmoregulation in freshwater are those of Na+ and Cl-.  
 
        
             
        
        
        
sodium-potassium pump. n. The enzyme-based mechanism that maintains correct cellular concentrations of sodium and potassium ions by removing excess ions from inside a cell and replacing them with ions from outside the cell.
 
        
                    
             
        
        
        
That would be a second degree burn.
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Hope this helped
        
                    
             
        
        
        
Answer:
Resident microflora b. may be responsible for opportunistic infections in immunocompromised
Explanation:
It is almost impossible to found these microorganisms in the stomach because of the acidic conditions, most of them are not adapted to this type of environment. Resident microflora is not transient, is actually permanent. However, resident microflora may be responsible for ooportunistic infections in immunocompromised and they can also increase the intensity of the disease produced by that pathogen.