Why do i have to do iready

In this model, what do p, s, and a bases represent?

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

Which of these example of a hereditary risk factor? smoking, eating junk food everyday, being a couch potato, having fair skin that is prone to sunburn