What is minute volume?

• A. The rate at which oxygen is consumed by tissues.
• B. The maximum amount of air the lungs can hold.
• C. The volume of air remaining after forced exhalation.
• D. The amount of gas inhaled or exhaled in one minute.

Answer: (D)

Minute volume is the total amount of air moved in and out of the lungs in one minute. It’s found by multiplying the air moved per breath (tidal volume) by how many breaths you take each minute (respiratory rate). This measure reflects how effectively ventilation is meeting the body’s needs. It’s not about the oxygen the tissues use (that’s oxygen consumption), not the maximum capacity of the lungs (that’s total or vital capacity), and not the air remaining after a forced exhale (that’s residual volume). So the definition described as the amount of gas inhaled or exhaled in one minute is the best fit.