This interrupted case study follows the progress of a pediatric patient who experiences an acute asthma exacerbation brought on by an environmental trigger.  Students completing the case will synthesize their understanding of respiratory system anatomy and physiology with the clinical treatment of an obstructive lung disorder.  Topics reviewed include bronchoconstriction and dilation, pulmonary ventilation, air flow, gas exchange, respiratory volumes, the oxygen-hemoglobin dissociation curve, pCO2, pO2, and the effects of medications used to treat asthma.  Students should have an understanding of the respiratory system before starting the case and thus it is best used at the end of the respiratory system unit as a way for students to apply what they have learned to a real-world situation.  The case was developed for an anatomy and physiology class for majors taught through the “flipped” method at a community college, but would also work well for students in a pathophysiology course or in pre-professional programs in health care.  It may also be suitable for high school students in an advanced or honors anatomy and physiology program.