The inspiratory reserve volume + tidal volume + expiratory reserve volume is the same as

Question

The inspiratory reserve volume + tidal volume + expiratory reserve volume is the same as (A) inspiratory capacity + expiratory reserve volume (B) total lung capacity - functional residual capacity (C) inspiratory capacity + functional residual capacity (D) inspiratory capacity + residual volume

Tardigrade Admin · Accepted Answer

Inspiratory reserve volume (IRV) + tidal volume (TV) + expiratory reserve volume (ERV) represents vital capacity (VC). Now, inspiratory capacity is the total volume of air that can be inhaled after a normal expiration.* It includes tidal volume and inspiratory reserve volume i.e., IC = TV + IRV. Thus, option (a) is correct which says that vital capacity i.e., IRV + TV + ERV = IC + ERV.

Q. The inspiratory reserve volume $+$ tidal volume $+$ expiratory reserve volume is the same as

inspiratory capacity $+$ expiratory reserve volume

total lung capacity $-$ functional residual capacity

inspiratory capacity $+$ functional residual capacity

inspiratory capacity $+$ residual volume

Q. The inspiratory reserve volume + tidal volume + expiratory reserve volume is the same as

inspiratory capacity + expiratory reserve volume

total lung capacity − functional residual capacity

inspiratory capacity + functional residual capacity

inspiratory capacity + residual volume

Q. The inspiratory reserve volume $+$ tidal volume $+$ expiratory reserve volume is the same as

inspiratory capacity $+$ expiratory reserve volume

total lung capacity $-$ functional residual capacity

inspiratory capacity $+$ functional residual capacity

inspiratory capacity $+$ residual volume