During training session in the laboratory the students were performing spirography on themselves. What indicator CANNOT be measured with this method?

Answer options

1. Maximal breathing capacity
2. Vital capacity
3. Respiration rate
4. Respiratory minute volume
5. Functional residual capacity

Explanation

Functional Residual Capacity (FRC) is the volume of air present in the lungs at the end of passive expiration residual volume is a predicted value because it is the amount of air left in the lungs after a maximum exhale. The spirometer can't measure inside the lungs.