BIOD 151 EXAM - PORTAGE LEARNING FINAL EXAM QUESTIONS WITH CORRECT VERIFIED ANSWERS | 100% PASS (A+ CERTIFIED)

BIOD 151 EXAM - PORTAGE LEARNING FINAL EXAM QUESTIONS WITH CORRECT VERIFIED ANSWERS | 100% PASS (A+ CERTIFIED) 1. How many lobes does the left human lung have Correct Answer Two lobes. 2. Air and food pass in which one of the following areas Correct Answer Oropharynx. 3. In the respiratory system, gas exchange occurs in the Correct Answer B&D - Respiratory bronchioles and pulmonary alveoli. 4. Label the following five items from the diagram Correct Answer Label A - Nasal cavity. Label C - Soft palate/uvula. Label E - Glottis. Label F - Trachea. Label H - Tongue. 5. Explain what happens to the epiglottis during swallowing. Why Correct Answer The trachea is closed by the epiglottis. The epiglottis moves inferiorly, covering the trachea. This is to prevent food or liquid from entering the lungs. 6. Explain at least two differences between type I and type II alveolar cells Correct Answer A. Type I form the very thin simple squamous epithelium of the alveoli in junction with the capillaries. Make up roughly 95% of alveolar epithelial cells. B. Type II produce and secrete pulmonary surfactant which is needed throughout alveolar surface to keep the alveoli open. In addition, type II cells divide to replace damaged type I cells. Make up roughly 5% alveolar epithelial cells. 7. True/False: Positive pressure is used to move air into the lungs Correct Answer False - Negative pressure. 8. True/False: During exhalation the diaphragm contracts to actively push air out of the lungs Correct Answer False. 9. True/False: During inhalation the rib cage lifts in an upward motion to open and expand the lungs Correct Answer True.