Question

Match List I with List II

List I		List II
A	Expiratory capacity	I	Expiratory reserve volume + Tidal volume + Inspiratory reserve volume
B	Functional residual capacity	II	Tidal volume + Expiratory reserve volume
C	Vital capacity	III	Tidal volume + Inspiratory reserve volume
D	Inspiratory capacity	IV	Expiratory reserve volume + Residual volume

Choose the correct answer from the options given below:

• A. A-II, B-IV, C-I, D-III
• B. A-III, B-II, C-IV, D-I
• C. A-II, B-I, C-IV, D-III
• D. A-I, B-III, C-II, D-IV

Answer 1

The Correct Option is A

To match List I with List II, we need to understand the definitions of the respiratory volumes and capacities given:

• Expiratory Capacity (EC): It is the total amount of air a person can exhale after a normal inhalation. It is usually calculated as the sum of Tidal Volume (TV) + Expiratory Reserve Volume (ERV). Thus, A matches with II.
• Functional Residual Capacity (FRC): This is the volume of air remaining in the lungs after a normal expiration. It is Expressed as Expiratory Reserve Volume (ERV) + Residual Volume (RV). Hence, B matches with IV.
• Vital Capacity (VC): This is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It can be expressed as Expiratory Reserve Volume (ERV) + Tidal Volume (TV) + Inspiratory Reserve Volume (IRV). Hence, C matches with I.
• Inspiratory Capacity (IC): This is the maximum amount of air a person can inhale after a normal expiration. It is expressed as Tidal Volume (TV) + Inspiratory Reserve Volume (IRV). Thus, D matches with III.

The correct match is therefore: A-II, B-IV, C-I, D-III.

Answer 2

- Expiratory capacity (A) is the sum of Expiratory reserve volume and Tidal volume (II).

- Functional residual capacity (B) is the sum of Expiratory reserve volume and Residual volume (IV).

- Vital capacity (C) is the sum of Tidal volume, Inspiratory reserve volume, and Expiratory reserve volume (I).

- Inspiratory capacity (D) is the sum of Tidal volume and Inspiratory reserve volume (III).