Final answer:
The term for the volume of air that stays in the lungs at rest is known as the 'functional residual capacity', which includes the residual volume and the expiratory reserve volume. The residual volume is the air left in the lungs that cannot be expelled after a maximal exhalation. The correct option is c) functional residual capacity
Step-by-step explanation:
Between breaths (at rest), some air that remains in your lungs is known as the functional residual capacity, which consists of the residual volume (RV) and the expiratory reserve volume (ERV). The residual volume is the air left in the lungs after a maximal exhalation and cannot be expelled.
Measuring these respiratory volumes, such as the tidal volume (TV), inspiratory reserve volume (IRV), expiratory reserve volume (ERV), and residual volume (RV), provides crucial information about a person's respiratory health. These measurements ensure that gas exchange within the alveoli operates efficiently, and helps to prevent lung collapse, facilitating continuous and effective breathing. The correct option is c) functional residual capacity