A) inspiratory capacity + expiratory reserve volume
B) total lung capacity - functional residual capacity
C) inspiratory capacity + functional residual capacity
D) inspiratory capacity + residual volume
Correct Answer: D
Solution :
Inspiratory Reserve Volume + Tidal Volume + expiratory reserve volume will be the same as inspiratory capacity + residual volume as IRV + TV + ERV = Inspiratory Capacity (1C) + RV Tidal volume is approximately 500 mL in a healthy person. Inspiratory reserve volume averages 2500+3000 mL inspiratory reserve volume averages 1000 mL to 1100 mL Residual volume is 1100 mL to 1200mL Inspiratory reserve capacity of a person is the total volume of a person can inspire after a normal inspiration and is equal to Tidal Volume (TV) and expiratory reserve volume. So, IRV (3000) + TV (500) + 1100 TV + IRV (IC) + RV 4600 = 500 + 3000 + 1100 = 4600 LHS = RHS
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