Define tidal volume, inspiratory reserve volume, expiratory reserve volume, and vital capacity.

Define tidal volume, inspiratory reserve volume, expiratory reserve volume, and vital capacity.

• A. Tidal volume is the total air breathed per minute.
• B. Inspiratory reserve volume is the air remaining in the lungs after normal expiration.
• C. Tidal volume is air per normal breath; inspiratory reserve volume is the extra air inhaled beyond a normal inspiration; expiratory reserve volume is the extra air exhaled beyond a normal expiration; vital capacity is the maximum air exhaled after a maximal inhalation.
• D. Vital capacity is the total lung capacity when fully inflated.

Answer: (C)