Exercise-Induced Asthma Vigorous exercise with high levels of physical activity c...

Exercise-Induced Asthma

Vigorous exercise with high levels of physical activity can induce asthma particularly in children. When Whitney had her asthma attack, her breathing became more rapid, the temperature within her airways increased, and the muscles around the bronchi contracted, causing a narrowing of the airways. Whitney’s symptoms, which may occur within 5 to 20 min after the start of vigorous exercise, include shortness of breath, wheezing, and coughing. Whitney now does several things to prevent exercise induced asthma. She uses a pre-exercise inhaled medication before she starts her activity. The medication relaxes the muscles that surround the airways and opens up the airways. Then she does a warm-up set of exercises. If pollen counts are high, she avoids exercising outdoors.

Whitney’s tidal volume, which is the volume of air that she inhales and exhales, was 0.54 L. Her tidal volume was measured at a body temperature of 37 °C and a pressure of 745 mmHg. How many moles of nitrogen does she inhale in one breath if air contains 78% nitrogen?