Final answer:
The volume of air moved in a single respiration is called the tidal volume, which is approximately 500 milliliters in adults.
Step-by-step explanation:
The volume of air moved in a single respiration is called the tidal volume. This is the amount of air that enters or leaves the lungs during a normal breath and is usually about 500 milliliters in adults. The tidal volume is part of the four major types of respiratory volumes, which also include the inspiratory reserve volume (the extra air inhaled during a deep breath), the expiratory reserve volume (the additional air exhaled during a forceful breath out), and the residual volume (the air remaining in the lungs after a maximal exhale to prevent alveoli collapse).