What is the acceptable range for PCO2 levels in arterial blood?

The acceptable range for PCO2 levels in arterial blood is 35 to 45 mmHg. This range represents the normal respiratory status and the body’s ability to maintain acid-base balance through ventilation. A PCO2 level below 35 mmHg indicates hyperventilation, which can lead to respiratory alkalosis due to excessive carbon dioxide exhalation. Conversely, a PCO2 level above 45 mmHg indicates hypoventilation, leading to an accumulation of carbon dioxide and potentially causing respiratory acidosis. Therefore, the range of 35 to 45 mmHg is crucial for ensuring that the body is adequately regulating its carbon dioxide levels, which is vital for overall metabolic function and homeostasis.