Question

Match List I with List II :

List I (Respiratory Volume)     List II (Capacity in mL)
A. ERV (Expiratory Reserve Volume)   I. 2500 - 3000 mL
B. RV (Residual Volume)              II. 500 mL
C. IRV (Inspiratory Reserve Volume)  III. 1000 - 1100 mL
D. TV (Tidal Volume)                 IV. 1100 - 1200 mL

Choose the correct answer from the options given below :

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

Hint:

Logic Tip: Rank them by size to avoid confusion! Smallest: TV ($500\text{ mL}$) Middle: ERV ($1000-1100\text{ mL}$) and RV ($1100-1200\text{ mL}$) Largest: IRV ($2500-3000\text{ mL}$) You can always breathe {in} much more than you can forcefully breathe {out}!

Answer 1

The Correct Option is B

Step 1 : Understanding the Question:
The question asks to match standard pulmonary (respiratory) volumes with their approximate average numerical values in a healthy human adult. These volumes are measured using a spirometer and are crucial for diagnosing lung health.
Step 2 : Key Formulas and Approach:
The approach involves recalling the standard physiological ranges for the four basic lung volumes:
1. Tidal Volume (TV) - normal breath.
2. Inspiratory Reserve Volume (IRV) - extra air in.
3. Expiratory Reserve Volume (ERV) - extra air out.
4. Residual Volume (RV) - air that stays in.
Step 3 : Detailed Explanation:

Tidal Volume (D): This represents the volume of air inspired or expired during normal, effortless breathing. Its average value is approximately 500 mL. Thus, D matches with II.

Inspiratory Reserve Volume (C): This is the additional volume of air a person can forcibly inspire over and above the tidal volume. Since our lungs have a large capacity for deep inhalation, this is the largest basic volume, averaging 2500 to 3000 mL. Thus, C matches with I.

Expiratory Reserve Volume (A): This is the extra air a person can forcibly expire after a normal tidal expiration. It averages between 1000 and 1100 mL. Thus, A matches with III.

Residual Volume (B): Even after the most forceful expiration, some air always remains in the lungs to prevent alveolar collapse. This averages between 1100 and 1200 mL. Thus, B matches with IV.

Step 4 : Final Answer:
The correct matching sequence is A-III, B-IV, C-I, and D-II. This combination is found in option (B).