If a person exhales out forcefully by applying all his efforts, what will be the pulmonary volume inhaled by him immediately under normal condition without applying any extra effort ?

Options

A. TV + IRV
B. TV only
C. TV + ERV
D. TV + IRV + ERV

Answer

To solve the question regarding the pulmonary volume inhaled by a person immediately after forcefully exhaling, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Pulmonary Volumes**:
- The pulmonary volumes consist of different components, including Tidal Volume (TV), Expiratory Reserve Volume (ERV), and Inspiratory Reserve Volume (IRV).
- Tidal Volume (TV) is the amount of air inhaled or exhaled during normal breathing, which is approximately 500 ml.

2. **Forcible Exhalation**:
- When the person forcefully exhales, they expel both the Tidal Volume (TV) and the Expiratory Reserve Volume (ERV).
- This means that the total volume exhaled includes the normal breath and the additional air that can be forcibly exhaled.

3. **Normal Inhalation After Forcible Exhalation**:
- After forcefully exhaling, the person will want to inhale normally.
- Under normal conditions, without applying any extra effort, the person can only inhale the Tidal Volume (TV) again, which is approximately 500 ml.

4. **Conclusion**:
- Therefore, the pulmonary volume inhaled by the person immediately after forceful exhalation, under normal conditions, is equal to the Tidal Volume (TV), which is approximately 500 ml.

### Final Answer:
The pulmonary volume inhaled by the person immediately under normal conditions is approximately **500 ml**.

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