If expiratory reserve volume (ERV) is 1100 ml , residual volume (RV) is 1200 ml and tidal volume (TV) is 500 ml, what shall be the functional residual capacity (FRC)?

1200ml

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2300ml

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2800ml

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1600ml

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Solution

The correct option is B 2300ml
Functional residual capacity : It is the amount of air that normally remains inside lungs after expiration.
Functional residual capacity (FRC)= Expiratory reserve volume (ERV) + Residual volume (RV)
Hence , FRC = 1100 ml + 1200 ml = 2300 ml

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Similar questions

From the following relationships between respiratory volume 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)

Codes

(a) (i) Incorrect, (ii) incorrect, (iii) incorrect, (iv) Correct

(b) (i) Incorrect, (ii) Correct, (iii) incorrect, (iv) Correct

(d) (i) Correct, (ii) Incorrect, (iii) Correct, (iv) Incorrect

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