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The volume of air inhaled or exhaled during a specific respiratory cycle is measured by different respiratory volumes. The options given are Expiratory Reserve Volume, Inspiratory Reserve Volume, Tidal Volume, and Vital Capacity.
1. Expiratory Reserve Volume: This refers to the additional volume of air that can be forcibly exhaled after a normal exhalation. It is the amount of air that can be expelled forcefully after breathing out normally.
2. Inspiratory Reserve Volume: This is the additional volume of air that can be forcibly inhaled after a normal inhalation. It is the amount of air that can be taken in forcefully after breathing in normally.
3. Tidal Volume: This is the volume of air inhaled or exhaled during a normal breath at rest. It is the amount of air that is breathed in and out during each breath during normal breathing.
4. Vital Capacity: This is the total amount of air a person can exhale after a maximum inhalation. It is the sum of the Tidal Volume, Inspiratory Reserve Volume, and Expiratory Reserve Volume. Vital Capacity represents the maximum volume of air that a person can move in and out of their lungs.
The correct answer is option 4, Vital Capacity, as it represents the volume