Identify the correct and incorrect match about respiratory volume and capacities and mark the correct answer. i. Inspiratory capacity (IC) = Tidal Volume + Residual Volume ii. Vital Capacity (VC) = Tidal Volume (TV) + Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV). iii. Residual Volume (RV) = Vital Capacity (VC) - Inspiratory Reserve Volume (IRV) iv. Tidal Volume (TV) = Inspiratory Capacity (IC) - Inspiratory Reserve Volume (IRV)

Question

Identify the correct and incorrect match about respiratory volume and capacities and mark the correct answer. i. Inspiratory capacity (IC) = Tidal Volume + Residual Volume ii. Vital Capacity (VC) = Tidal Volume (TV) + Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV). iii. Residual Volume (RV) = Vital Capacity (VC) - Inspiratory Reserve Volume (IRV) iv. Tidal Volume (TV) = Inspiratory Capacity (IC) - Inspiratory Reserve Volume (IRV) (A) (i) Incorrect, (ii) Incorrect, (iii) Incorrect, (iv) Correct (B) (i) Incorrect, (ii) Correct, (iii) Incorrect, (iv) Correct (C) (i) Correct, (ii) Correct, (iii) Incorrect, (iv) Correct (D) (i) Correct, (ii) Incorrect, (iii) Correct, (iv) Incorrect

Tardigrade Admin · Accepted Answer

Inspiratory capacity is the amount of air inhaled during normal breathing and also during forceful breathing. Thus

I C = T V + I R V

Residual volume is the amount of air left in the lungs after forceful breathing.
Thus

R V = FRC - ER V

Tidal volume is amount of air inhaled or exhaled during normal breathing

T V = I C - I R V (I C i s T V + I R V)

Vital capacity includes all the volumes except tidal volume.