PBio506 - Week 4 Practice Quiz 1 1. Jan 28th Describe the events and forces during inspiration and expiration. 2. Jan 28th What is lung compliance? How is it changed in people with emphysema and pulmonary brosis? 3. Jan 28th What is the relationship between air ow and radius of the airway? How is a decrease in air ow diagnosed with spirometry? How does the airway change in emphysema? PBio506 - Week 4 Practice Quiz 2 4. Ideal Gas Exchange Partial Pressures. Which partial pressure is unrealistic for the location listed under normal resting conditions? (a) PCO2 of 20 mmHg in the alveoli. (b) PO2 of 100 mmHg in the <a href="/keyword/venous-blood/" >venous blood</a> . (c) PO2 of 150 mmHg in the alveoli. (d) PCO2 of 40 mmHg in the arterial blood. (e) PH2 O of 47 mmHg in the trachea. 5. Ideal Gas Exchange The alveolar gas equation is PA CO2 R PA O2 = FI O2 (PB 47mmHg) = PI O 2 where R is PA CO2 R VCO2 . VO 2 (1) (2) Explain what each term means, how one might measure a value for that term, and predict the changes in PA O2 for changes to each term. Note that 47 mmHg is the saturating partial pressure of H2 O. 6. Ideal Gas Exchange Which of the following is NOT a typical cause of hypoxia? (a) High Altitude. (b) Alveolar hypoventilation. (c) Decreased lung di usion capacity. (d) Age related decrease in blood O2 content. (e) All of the above are typical causes.