What is the normal vital capacity (VC) range in mL/kg?

The normal vital capacity (VC) range is typically expressed as a function of body weight and is measured in mL/kg. A vital capacity range of 65 to 75 mL/kg is considered normal for healthy adults, reflecting the volume of air that can be exhaled after a maximal inhalation.

This range is important as it provides insight into the respiratory system's ability to function effectively. Maintaining a VC within this range indicates normal lung volume and respiratory health. Values outside this range may suggest potential respiratory issues or inefficiencies in lung function, further warranting clinical investigation.

The other ranges may not accurately represent the expected normal physiological levels for an adult’s vital capacity, thus making the correct choice stand out based on established medical guidelines and norms for respiratory function testing.