Enzymes are not found in the esophagus or the large intestine. Based on the absence of
enzymes, what can be concluded about these organs? Explain.

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