What are normal values of CO2 in the body?

The normal values of carbon dioxide (CO2) in the body are crucial for assessing respiratory function and maintaining acid-base balance. When considering the correct answer, a CO2 concentration of 5-6% corresponds to a partial pressure range of 35-45 mm Hg. This range is considered normal for arterial blood gases and is indicative of adequate ventilation and metabolic function.

The values mentioned reflect the physiological balance maintained by the lungs and the metabolic processes of the body. At 5-6%, the body is effectively regulating CO2 levels through respiration, ensuring that exchanges between CO2 and oxygen occur efficiently in the alveoli. The pH of blood, which is tightly regulated, also relies on keeping CO2 concentrations within this range. Deviations from these values could indicate hypoventilation, hyperventilation, or other respiratory or metabolic conditions.

The other values provided do not align with established physiological norms. For instance, concentrations or pressures below or above the normal range could suggest significant clinical conditions, such as respiratory failure or metabolic disorders. Thus, understanding normal physiological values is essential for monitoring patients, especially in surgical settings where anesthesia and respiratory control are critical.