Which term represents the volume of air per minute moved in and out of the lungs?

• A. Tidal Volume
• B. Dead Space
• C. Residual Volume
• D. Minute Volume

Answer: (D)

The main idea is minute volume, the amount of air moving in and out of the lungs each minute. It’s determined by how much air you move with each breath (tidal volume) and how many breaths you take per minute (respiratory rate). Multiply those two factors to get the total air moving per minute.

Tidal volume describes the volume of air per normal breath, not per minute. Dead space refers to the portion of each breath that does not participate in gas exchange. Residual volume is the air remaining in the lungs after a complete exhale. Minute volume combines breath size and breathing frequency to express the overall flow of air per minute, which is why it’s the correct term.