Final answer:
Metabolic acidosis is described as a decreased blood bicarbonate level, PCO2, and pH. It is often related to kidney disease and can be identified through lab tests for pH, PCO2, and HCO3- levels.
Step-by-step explanation:
Metabolic acidosis is characterized by a decrease in blood bicarbonate levels resulting in a decreased pH. Acidosis occurs when the blood is too acidic, with a pH lower than 7.35. Initially, the PCO2 may be normal, but in a compensatory attempt to reestablish a proper balance, the body will lower the PCO2.
This condition may result from kidney disease or metabolic problems such as diabetic ketoacidosis. Laboratory tests measuring pH, CO2 partial pressure (PCO2), and bicarbonate (HCO3-) can help diagnose whether an imbalance is due to metabolic or respiratory factors and assess compensatory responses.
Therefore, the correct answer to the question "Metabolic acidosis is described as a(n):" is d. Decrease in CO2 content and PCO2 with a decreased pH.