Which of the following statements are true a. store brands are better quality
b. store brands are cheaper then national brands.
c. store brands are more expensive due to high cost of advertising
d. store brands are more nutritious

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