The following results were obtained from spirometry before and after a bronchodilator administration:

Which of the following is the correct interpretation of these data?

Prior to an exercise study, a pulmonary function technologist finds that the patient's RER is 1.13. Which of the following best explains this finding?

To assure linearity of an oxygen analyzer, calibrate with

A 35-year-old healthy male is performing a maximal stress test as part of an annual physical. The following data are observed:

The patient denies any symptoms. Which of the following should a pulmonary function technologist do first?

Successive peak flow measurements made with a peak flowmeter on a subject previously diagnosed as having asthma yield the following results:

Which of the following is the best explanation for these?