Physiology The tidal volume is A The amount of air that normally moves into (or out of) the lung with each respiration. B The amount of air that enters the lung but does not participate in gas exchange. C The largest amount of air expired after maximal expiratory effort. D The largest amount of gas that can be moved into and out of the lungs in 1 min. 💡 Explanation The tidal volume is ✓ Correct Answer: A. The amount of air that normally moves into (or out of) the lung with each respiration.