Given the following volumes what would the VC, TLC, and IC be? Tidal volume = 450, Inspiratory reserve volume = 2400, Expiratory reserve volume = 900, Residual volume = 1100.

Answer

To find the lung capacities, we apply the standard physiological formulas using the given lung volumes: 1. Vital Capacity (VC): This is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is calculated by adding Tidal Volume (TV), Inspiratory Reserve Volume (IRV), and Expiratory Reserve Volume (ERV). VC = TV + IRV + ERV = 450 + 2400 + 900 = 3750. 2. Total Lung Capacity (TLC): This is the maximum volume of air that the lungs can hold. It is calculated by adding Vital Capacity (VC) and Residual Volume (RV). TLC = VC + RV = 3750 + 1100 = 4850. 3. Inspiratory Capacity (IC): This is the maximum volume of air that can be inhaled after a normal tidal expiration. It is calculated by adding Tidal Volume (TV) and Inspiratory Reserve Volume (IRV). IC = TV + IRV = 450 + 2400 = 2850. Final Answers: VC = 3750, TLC = 4850, IC = 2850.