Final answer:
The term for the amount of air taken in during a single normal inspiration is 'tidal volume (TV)', which refers to the volume of air inhaled and exhaled during normal breathing.
Step-by-step explanation:
The term that defines the amount of air taken in during a single normal inspiration is known as the tidal volume (TV). Tidal volume refers to the volume of air that is inspired and expired during normal, quiet breathing. It is distinct from inspiratory capacity (IC), which represents the amount of air that can be taken in during a deep breath, which includes the tidal volume and the inspiratory reserve volume. On the other hand, the vital capacity (VC) measures the maximum amount of air that can be inhaled or exhaled during a direct respiratory cycle. Lastly, the total lung capacity (TLC) is the sum of all the lung volumes, which represents the total volume of air that the lungs can hold.