AEMCA Practice Exam

Which of the following conditions increases pH levels in the body?

1. Respiratory acidosis

2. Metabolic alkalosis

3. Respiratory failure

4. Metabolic acidosis

The correct answer is: Metabolic alkalosis

Metabolic alkalosis is the condition that leads to an increase in pH levels in the body. In this situation, there is an excess of bicarbonate or a loss of hydrogen ions, which causes the blood pH to rise above the normal range. This typically occurs as a result of factors such as prolonged vomiting, diuretic use, or excessive intake of alkaline substances. Understanding pH regulation is crucial for maintaining homeostasis, as deviations in pH can affect various physiological functions. In contrast, respiratory acidosis and metabolic acidosis occur when there is a retention of carbon dioxide or an accumulation of acid in the body, leading to lower pH levels. Similarly, respiratory failure can also result in decreased pH due to inadequate gas exchange, leading to an increase in carbon dioxide. Thus, metabolic alkalosis distinctly stands out as the condition that actively increases pH, promoting a more alkaline state in the body.