Total volume of air a person can expire after a normal inspiration is called

Options

A. Vital capacity
B. Functional residual capacity
C. Inspiratory capacity
D. Expiratory capacity

Answer

To determine the total volume of air a person can expire after a normal inspiration, we need to understand the definitions of the terms provided in the options:

1. **Vital Capacity**: This is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It includes tidal volume, inspiratory reserve volume, and expiratory reserve volume.

2. **Functional Residual Volume**: This is the volume of air remaining in the lungs after a normal expiration. It consists of the expiratory reserve volume and residual volume.

3. **Inspiratory Capacity**: This is the maximum amount of air a person can inhale after a normal expiration. It is the sum of tidal volume and inspiratory reserve volume.

4. **Expiratory Capacity**: This is the total volume of air that can be expired after a normal inspiration. It is the sum of tidal volume and expiratory reserve volume.

Now, based on the definitions, we can conclude:

- The question asks for the total volume of air a person can expire after a normal inspiration. This is defined as **Expiratory Capacity**.

Thus, the correct answer is **Expiratory Capacity**.

### Steps Summary:
1. Understand the definitions of the respiratory volumes.
2. Identify which term corresponds to the total volume of air expired after normal inspiration.
3. Conclude that the correct answer is **Expiratory Capacity**.