Arrange the following in the order of increasing volume
1) Tidal volume
2) Redidual volume
3) Expiratory reserve volume
4) Vital capacity

Options

A. `1 lt 2 lt 3 lt 4`
B. `1 lt 3 lt 2 lt 4`
C. `1 lt 4 lt 3 lt 2`
D. `1 lt 4 lt 2 lt 3`

Answer

To arrange the given lung volumes in the order of increasing volume, we need to first understand the definitions and approximate volumes of each:

1. **Tidal Volume (TV)**: This is the volume of air that is inspired or expired during normal breathing. The approximate volume is about **500 ml**.

2. **Expiratory Reserve Volume (ERV)**: This is the maximum amount of air that can be forcibly expired after a normal expiration. Its volume is approximately **1000 ml to 1100 ml**.

3. **Residual Volume (RV)**: This is the volume of air that remains in the lungs after a forcible expiration. Its volume is approximately **1100 ml to 1200 ml**.

4. **Vital Capacity (VC)**: This is the total amount of air that can be inspired and expired to a maximum level. It is the sum of Tidal Volume, Inspiratory Reserve Volume (not provided in this question), and Expiratory Reserve Volume. The volume is approximately **3400 ml to 4800 ml**.

Now, we can summarize the approximate volumes:
- Tidal Volume (TV): 500 ml
- Expiratory Reserve Volume (ERV): 1000 ml to 1100 ml
- Residual Volume (RV): 1100 ml to 1200 ml
- Vital Capacity (VC): 3400 ml to 4800 ml

Next, we can arrange these volumes in increasing order:
1. Tidal Volume (500 ml)
2. Expiratory Reserve Volume (1000 ml to 1100 ml)
3. Residual Volume (1100 ml to 1200 ml)
4. Vital Capacity (3400 ml to 4800 ml)

Thus, the order of increasing volume is:
**Tidal Volume (1), Expiratory Reserve Volume (3), Residual Volume (2), Vital Capacity (4)**.

Final arrangement: **1, 3, 2, 4**.