Acid/Base Balance

The pH of our blood plasma and other bodily fluids is very closely monitored and regulated.  As metabolic acids or bases are produced, components of the blood plasma (and RBC intracellular fluid), the respiratory system and the urinary system all play a role in preventing large changes in pH.
 
1.  What are the components of the blood plasma & RBC fluid that prevent large changes in our blood pH?   How do they work to prevent changes in pH?

2.  Tubulointerstitial nephritis can cause metabolic acidosis as you described in question 2.  Since the kidney and components of the blood are insufficient to maintain pH, the respiratory system has to compensate.  What would you expect the patients respiratory rate to be?  How would this compensate for (correct) metabolic acidosis?

3.  What would you expect the blood gases to be if compensation is occurring?
   Plasma pH=
   Plasma pCO2 =
   Plasma HCO3- =