Question

lo 4.4. what is residual volume?
amount of air that remains in the trachea after a forceful exhale
amount of air that remains in the lungs after a forceful exhale
amount of air that remains in the nasal cavity after a forceful exhale
amount of air that remains in the bronchi after a forceful exhale
amount of air that remains in the throat after a forceful exhale

Explanation:

Residual volume is the amount of air that remains in the lungs after a forceful exhalation. This is a standard definition in respiratory physiology. The trachea, nasal cavity, bronchi, and throat are not the sites where residual volume is located. Residual volume helps in preventing the collapse of alveoli and maintaining gas exchange even between breaths.

Answer:

Amount of air that remains in the lungs after a forceful exhale