What is the period between end of one inspiration and the beginning of the next inspiration?

• A. Volume Cycling
• B. Exhalation
• C. Flow Cycling
• D. Pressure Limit

Answer: (B)

Expiration, or exhalation, is the period after the end of one inspiration until the next one begins. It’s the expiratory phase of the respiratory cycle, typically passive as the lungs and chest wall recoil and air flows out through the circuit. The other terms describe how inspiration ends (volume-based, flow-based, or a pressure limit), not the interval between breaths.