Bio 235 Final Exam WITH COMPLETE SOLUTION 2023

Bio 235 Final Exam 1. Venous blood returning from systemic circulation first enters the ___, proceeds to the ____, loses ___and gains ____ in the lungs, and then returns to the heart via the ____. a) right atrium, right ventricle, pulmonary artery, CO2, O2, pulmonary veins. b) Left atrium, left ventricle, pulmonary artery, CO2, O2, aorta c)Right atrium, right ventricle, pulmonary artery, O2, CO2, pulmonary veins d) Left atrium, right ventricle, pulmonary veins, O2, CO2, aorta: A. Right atrium, right ventricle, pulmonary artery, CO2, O2, pulmonary veins 2. The upper respiratory tract differs from the lower respiratory tract in what way? A) air is taken in through the lower respiratory tract, and CO2/O2 are exchanged in the upper respiratory tract b) air is taken in through the upper respiratory tract, and CO2/O2 are exchanged in the lower respiratory tract c) CO2 is removed from circulation in the upper respiratory tract d) O2 is removed from circulation in the lower respiratory tract: B. Air is taken in through the upper respiratory tract, and CO2/O2 are exchanged in the lower respiratory tract 3. Smooth muscle surrounds which structure of the lower respiratory tract? a) Alveoli b) Alveolar capillaries c) Terminal bronchioles d) Trachea: C. terminal bronchioles 4. In the alveolus, ____squamous epithelial cells are responsible for ___, while ___cells are responsible for ____. a) Type 1; surfactant secretion; Type 2, gas exchange b) type 1; debris removal; type 2; surfactant secretion c) type 3; debris removal; type 1; gas exchange d) type 1; gas exchange; type 2: surfactant secretion: d) type 1; gas exchange; type 2: surfactant secretion 5. There is no net air flow into or out of the lungs when a) P alveolus = P atmostpher b) P alveolus P atmostphere c) P pleural wall P atmostphere d) P atmosphere P pleural wall: a) P alveolus = P atmosphere 1 / 31 Bio 235 Final Exam 6. What keeps the lungs from collapsing Check the: b) trans pulmonary negative pressure caused by negative pressure from pleural cavity 7. Identify the correct sequence of events for inspiration a) diaphragm & inspiratory intercostals relax, lungs expand, air flows into alveoli b) diaphragm & inspiratory intercostals contract; lungs expand, air flows out of the alveoli c) diaphragm & inspiratory intercostals contract, lungs expand, air flows into alveoli d)diaphragm & expiratory intercostals relax, lungs contract, air flows out of alveoli: c) diaphragm & inspiratory intercostals contract, lungs expand, air flows into alveoli 8. the main determiners of lung compliance are a) lung tissue thickness, surface tension of fluid on the inner lung surface b) lung tissue perforations, surface tension of fluid on the inner lung surface c) lung tissue surface area, surface tension of fluid on the inner lung surface d) lung tissue thickness, surface tension of fluid on the outer lung surface: a) lung tissue thickness, surface tension of fluid on the inner lung surface 9. lung compliance is defined as a) lung volume/ transpulmonary pressure b) transpulmonary pressure/ lung volume c) transthoracic pressure/ atmospheric pressure d) none of the above: d) none of the above 10. trained athletes tend to