When you sneeze, abdominal muscles abruptly contract, pushing your diaphragm upward. Given the discussion of the respiratory cycle in Section 10.4, why does this change expel air out your nose?

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Section 10.4 Breathing ventilates the lungs in a respiratory cycle. During inspira- tion (inhalation), the chest cavity expands, pressure in the lungs falls below atmospheric pressure, and air flows into the lungs. During normal expiration (exhalation), these steps are reversed. The volume of air in a normal breath, called the tidal volume, is about 500 milliliters. Vital capacity is the maximum volume of air that can move out of the lungs after you inhale as deeply as possible.