Which condition is most commonly associated with the development of metabolic alkalosis?

• A. Excessive hydration
• B. Prolonged vomiting
• C. High sodium intake
• D. Overuse of potassium supplements

Answer: (B)

Metabolic alkalosis is a condition characterized by an increase in blood pH due to a loss of hydrogen ions or an increase in bicarbonate. Prolonged vomiting is commonly associated with metabolic alkalosis because it leads to the loss of gastric acid, which contains hydrochloric acid (HCl). When a person vomits, they are expelling stomach contents that contribute to the body's overall acidity. The loss of this acid results in an increased concentration of bicarbonate in the blood, thus raising the pH and leading to an alkaline state.

In contrast, conditions such as excessive hydration can dilute electrolytes but do not inherently lead to alkalosis; high sodium intake is primarily associated with fluid retention and can affect blood pressure rather than pH balance; and overuse of potassium supplements typically does not result in metabolic alkalosis, as potassium is more often involved in maintaining cellular function and acid-base balance rather than causing alkalosis. Thus, prolonged vomiting is the most relevant condition that contributes to the development of metabolic alkalosis.