For metabolic alkalosis, what is the expected change in HCO3 levels?

For metabolic alkalosis, what is the expected change in HCO3 levels?

• A. Decreased HCO3
• B. Normal HCO3
• C. Increased HCO3
• D. Fluctuating HCO3

Answer: (C)

In metabolic alkalosis, there is an increase in bicarbonate (HCO3) levels. This condition often arises due to various factors, such as excessive loss of hydrogen ions (H+) through vomiting or diuretics, or increased bicarbonate intake. When the body loses H+ ions, the balance shifts, leading to a higher concentration of HCO3 in the blood, which is the hallmark of metabolic alkalosis.

This increase in HCO3 contributes to the elevated pH levels characteristic of metabolic alkalosis. By understanding this metabolic process, it's clear why the correct answer reflects an increase in bicarbonate levels in this condition. Other answers do not reflect the nature of metabolic alkalosis, where the primary issue is the excess of bicarbonate rather than a decrease or fluctuation, which are more indicative of other metabolic or respiratory disturbances.