Portage learning Biod 151 module 2 exam

Question 1 4 / 4 pts How many lobes does the right human lung have? Your Answer: Three lobes. Three Lobes Question 2 3 / 3 pts Air and food pass in which one of the following areas: Trachea Nasopharynx Correct! Oropharynx Alveoli Question 3 3 / 3 pts Rings of cartilage line much of the respiratory tract. In which of one the following would cartilage NOT be found? Trachea Larynx Bronchi Correct! Alveoli Question 4 10 / 10 pts Label the following five items from the diagram: Label B- ___________ Label D- __________ Label E- __________ Label F- __________ Label G- __________ Your Answer: Label B- Oral Cavity Label D - Epiglottis Label E- Glottis Label F- Trachea Label G- Esophagus Label B- Oral Cavity Label D- Epiglottis Label E- Glottis Label F- Trachea Label G- Esophagus Question 5 5 / 5 pts Note: Essay answers must clearly be in your own words. Explain what happens to the epiglottis during swallowing. Why? Your Answer: When we swallow the epiglottis moves to block the entrance of food particles into our larynx and lungs. The muscles of the larynx pull upward to assist with this movement. They tightly close during swallowing. This prevents food from entering our lungs. 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. Question 6 5 / 5 pts Note: Essay answers must clearly be in your own words. Explain at least two differences between Type I and Type II alveolar cells. Your Answer: The type I cells is a complex branched cell with multiple cytoplasmic plates that are greatly attenuated and realatively devoid of organelles. Type I cells the very thin simple squamous epithelium of the alveoli junction with capillaries. Make up roughly 95 % of aleveolar epithelial cells. The Type II cells act as the 'caretaker' of the alveolar compartment. Type II produce and secrete pulmonary surfactant which is needed throughout the alveolar surface to keep the alveoli open. In addion, Type II cells can divide to replace damaged Type I cells. Make up roughly 5% of alveolar epithelial cells. a. Type I form the very thin simple squamous epithelium of the alveoli in junction with capillaries. Make up roughly 95% of alveolar epithelial cells. b. Type II produce and secrete pulmonary surfactant which is needed throughout the alveolar surface to keep the alveoli open. In addition, Type II cells can divide to replace damaged Type I cells. Make up roughly 5% of alveolar epithelial cells. Question 7 2 / 2 pts True/False: Positive pressure is used to move air into the lungs. True Correct! False (Negative pressure) Question 8 2 / 2 pts True/False: During inhalation the diaphragm contracts to pull the lungs open. Correct! True False Question 9 2 / 2 pts True/False: During inhalation the rib cage lifts in an upward motion to open and expand the lungs. Correct! True False Question 10 2 / 2 pts True/False: As the thoracic cavity expands and lung volume increases, the density of the gases filling the lungs decreases. Correct! True False