BIOD 151 MODULE 2 PORTAGE LEARNING|EXAM QUESTIONS AND 100% CORRECT ANSWERS|LATEST 2025/2026

BIOD 151 MODULE 2 PORTAGE
LEARNING|EXAM QUESTIONS AND 100%
CORRECT ANSWERS|LATEST 2025/2026
How many lobes does the right human lung have? - ANSWER-
B B B B B B B B B B three lobes B




Air and food pass through which area? - ANSWER-
B B B B B B B B Oropharynx



Rings of cartilage line much of the respiratory tract. In which of the following can cartilage NO
B B B B B B B B B B B B B B B B



T be found? - ANSWER-
B B B B Trachea B




Larynx

Bronchi

Alveoli B




(Alveoli)



Label B B




Label D B




Label E B




Label F B B




Label G - ANSWER- B B B B - Oral cavity
B B B




D - Epiglottis
B B




E - Glottis
B B




F - Trachea
B B




G - Esophagus
B B




Explain what happens to the Epiglottis during swallowing. Why? - ANSWER-
B B B B B B B B B B



When we swallow the Epiglottis moves to block the entrance of food particles into our l
B B B B B B B B B B B B B B B



arynx and lungs. The muscles of the Larynx pull upward to assist with this movement. They tig
B B B B B B B B B B B B B B B B



htly close during swallowing. This prevents food from entering our lungs.
B B B B B B B B B B B

, OR B




Trachea is closed by the Epiglottis. The Epiglottis moves inferiorly, covering the trachea. This is
B B B B B B B B B B B B B B B



to prevent food or liquid from entering the lungs.
B B B B B B B B




Explain atleast TWO differences between Type I and Type II Alveolar cells - ANSWER-
B B B B B B B B B B B B B



a. Type I form the very thin simple squamous epithelium of the alveoli in junction with c
B B B B B B B B B B B B B B B B



apillaries. Make up roughly 95% of alveolar epithelial cells.
B B B B B B B B B




b. Type II produce and secrete pulmonary surfactant which is needed throughout the alveolar
B B B B B B B B B B B B B B



surface to keep the alveoli open. In addition, type II cells can divide to replace damaged type I
B B B B B B B B B B B B B B B B B B



cells. Makeup roughly 5% of alveolar epithelial cells.
B B B B B B B




Positive pressure is used to move air into the lungs (T/F) - ANSWER-
B B B B B B B B B B B B True



During inhalation the diaphragm contracts to pull the lungs open (T/F) - ANSWER-
B B B B B B B B B B B B True



During inhalation the ribcage lifts in an upward motion to open and expand the lungs (T/F) -
B B B B B B B B B B B B B B B B



B ANSWER- True



As the thoracic cavity expands and lung volume increases, the density of the gases filling the lu
B B B B B B B B B B B B B B B B



ngs decreases (T/F) - ANSWER-
B B B B True



When the diaphragm rises, thoracic pressure increases and air naturally flows out of the lungs
B B B B B B B B B B B B B B B



(T/F) - ANSWER- B B True



Boyle's law states that gas volume is: - ANSWER-
B B B B B B B B Inversely proportional to pressure. B B B




Which tracheal cartilages are paired? - ANSWER-
B B B B B B arytenoid