When trying to gain or lose weight, it is important to consider intake of calories A) over time
B) over water
C) over sleep
D) over exercise

Which of the following are considered general purposes of performing pulmonary function tests (pfts)? 1. the functional status of the lungs 2. the diffusion characteristics of the alveolar-capillary membrane 3. how much and how fast gas can be moved into and out of the lungs 4. the specific diagnosis of pulmonary disease