The amount of air which one can inhale/exhale with maximum effort is called

Options

A. vital capacity
B. tidal volume
C. IRV
D. ERV

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes the maximum amount of air that can be inhaled or exhaled with maximum effort.

2. **Identifying the Options**:
- Option A: Vital Capacity
- Option B: Tidal Volume
- Option C: Inspiratory Reserve Volume (IRV)
- Option D: Expiratory Reserve Volume (ERV)

3. **Defining Each Option**:
- **Vital Capacity**: This is the total amount of air that can be inhaled or exhaled with maximum effort. It includes the tidal volume, inspiratory reserve volume, and expiratory reserve volume.
- **Tidal Volume**: This is the amount of air inhaled or exhaled during normal breathing without any effort.
- **Inspiratory Reserve Volume (IRV)**: This is the additional amount of air that can be inhaled after a normal inhalation, but it is not the total capacity.
- **Expiratory Reserve Volume (ERV)**: This is the additional amount of air that can be exhaled after a normal exhalation, but again, it does not represent the total capacity.

4. **Analyzing the Definitions**:
- From the definitions, it is clear that vital capacity is the only term that encompasses the maximum effort of inhalation and exhalation, making it the correct answer.

5. **Conclusion**: The correct answer to the question is **Option A: Vital Capacity**.

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