NEET Biology question
From the following relationships between respiratory volumes and capacities, mark the correct option. (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)
Answer: (A)
Solution
Inspiratory capacity is actually TV + IRV, not TV + RV, so (i) is incorrect; VC = TV + IRV + ERV is the standard correct relation, so (ii) is correct; RV is not equal to VC - IRV (that expression
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