BIOD 151 EXAM Questions and Answers With Verified Solutions 2025
What are the three main functions of the respiratory system (anatomical organization)? - ✔✔1) Air
conduction, 2) Air filtration, and 3) Exchange of Gases. (also called respiration)
What are three three parts of the pharynx? - ✔✔Nasopharynx, Oropharynx, laryngopharynx
True or false: the rings that cover the trachea are a complete circle. - ✔✔False, c like
1. How many lobes does the right human lung have? - ✔✔3
Air (and not food) pass in which of the following areas: - ✔✔Nasopharynx
Rings of cartilage line much of the respiratory tract. In which of one the following wouldcartilage NOT be
found? - ✔✔Alveoli
Explain what happens to the soft palate during swallowing. Why? - ✔✔The upward movement of the
soft palate prevents food or liquid from entering the nasal passages during swallowing.
. Explain at least two differences between Type I and Type II alveolar cells. - ✔✔. Type I form the very
thin simple squamous epithelium of the alveoli in junction withcapillaries. Make up roughly 95% of
alveolar epithelial cells.
Explain at least two differences between Type I and Type II alveolar cells. - ✔✔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 Icells. Make up roughly 5% of alveolar
epithelial cells.
. Negative pressure is used to move air into the lungs. - ✔✔True
, . During exhalation the diaphragm contracts to actively push air out of the lungs. - ✔✔False (during
inhalation)
During inhalation the rib cage lifts in an upward motion to open and expand the lungs. - ✔✔True
As the thoracic cavity expands and lung volume increases, the density of the gases filling thelungs
decreases. - ✔✔True
When the diaphragm rises, thoracic pressure increases and air naturally flows out of the lungs. -
✔✔True (air naturally flows out of the lungs because of the pressure difference)
1. Boyle's law states that gas volume is - ✔✔. Inversely proportional to pressure
Typical respiratory epithelium contains all of the following, except which one? - ✔✔layers
. Which cells are most abundant within the alveoli? - ✔✔Macrophages
. Which one of the following is not true of the respiratory physiology? - ✔✔Tidal volume is the maximum
amount of air able to be inhaled beyond normal inhalation
. Which one of the following is true of the respiratory physiology calculations? - ✔✔Total Lung Capacity
(TLC) = VC +RV
Typical respiratory epithelium contains cells where only some of the pseudostratifiedcolumnar cells
touch the basement membrane - ✔✔False -all pseudostratified cells touch the basement membrane.
. The vestibule is the most external portion of the nasal cavity. - ✔✔True
. The vestibule is lined with typical respiratory epithelium. - ✔✔False- stratified squamous epithelium is
found in the vestibule.
What are the three main functions of the respiratory system (anatomical organization)? - ✔✔1) Air
conduction, 2) Air filtration, and 3) Exchange of Gases. (also called respiration)
What are three three parts of the pharynx? - ✔✔Nasopharynx, Oropharynx, laryngopharynx
True or false: the rings that cover the trachea are a complete circle. - ✔✔False, c like
1. How many lobes does the right human lung have? - ✔✔3
Air (and not food) pass in which of the following areas: - ✔✔Nasopharynx
Rings of cartilage line much of the respiratory tract. In which of one the following wouldcartilage NOT be
found? - ✔✔Alveoli
Explain what happens to the soft palate during swallowing. Why? - ✔✔The upward movement of the
soft palate prevents food or liquid from entering the nasal passages during swallowing.
. Explain at least two differences between Type I and Type II alveolar cells. - ✔✔. Type I form the very
thin simple squamous epithelium of the alveoli in junction withcapillaries. Make up roughly 95% of
alveolar epithelial cells.
Explain at least two differences between Type I and Type II alveolar cells. - ✔✔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 Icells. Make up roughly 5% of alveolar
epithelial cells.
. Negative pressure is used to move air into the lungs. - ✔✔True
, . During exhalation the diaphragm contracts to actively push air out of the lungs. - ✔✔False (during
inhalation)
During inhalation the rib cage lifts in an upward motion to open and expand the lungs. - ✔✔True
As the thoracic cavity expands and lung volume increases, the density of the gases filling thelungs
decreases. - ✔✔True
When the diaphragm rises, thoracic pressure increases and air naturally flows out of the lungs. -
✔✔True (air naturally flows out of the lungs because of the pressure difference)
1. Boyle's law states that gas volume is - ✔✔. Inversely proportional to pressure
Typical respiratory epithelium contains all of the following, except which one? - ✔✔layers
. Which cells are most abundant within the alveoli? - ✔✔Macrophages
. Which one of the following is not true of the respiratory physiology? - ✔✔Tidal volume is the maximum
amount of air able to be inhaled beyond normal inhalation
. Which one of the following is true of the respiratory physiology calculations? - ✔✔Total Lung Capacity
(TLC) = VC +RV
Typical respiratory epithelium contains cells where only some of the pseudostratifiedcolumnar cells
touch the basement membrane - ✔✔False -all pseudostratified cells touch the basement membrane.
. The vestibule is the most external portion of the nasal cavity. - ✔✔True
. The vestibule is lined with typical respiratory epithelium. - ✔✔False- stratified squamous epithelium is
found in the vestibule.
