Question

The inspiratory reserve volume + tidal volume + expiratory reserve volume is 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

Answer 1

Answer: (D)

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 $500mL$ in a healthy person. Inspiratory reserve volume averages $2500+3000mL$ inspiratory reserve volume averages $1000mL$ to $1100mL$ Residual volume is $1100mL$ 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