BIOD 151 Module 2 Exam 2025. All Exam Questions and Correct Answers
With 100% Correct Answers | Latest 2025 Update.
How many lobes does the right human lung have? - ANSWER- three lobes
Air and food pass through which area? - ANSWER- Oropharynx
Rings of cartilage line much of the respiratory tract. In which of the following can cartilage NOT
be found? - ANSWER- Trachea
Larynx
Bronchi
Alveoli
(Alveoli)
Label B
Label D
Label E
Label F
Label G - ANSWER- B - Oral cavity
D - Epiglottis
E - Glottis
F - Trachea
G - Esophagus
Explain what happens to the Epiglottis during swallowing. Why? - 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.
OR
Trachea is closed by the Epiglottis. The Epiglottis moves inferiorly, covering the trachea. This is
to prevent food or liquid from entering the lungs.
Explain atleast TWO differences between Type I and Type II Alveolar cells - ANSWER- 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. Makeup roughly 5% of alveolar epithelial cells.
Positive pressure is used to move air into the lungs (T/F) - ANSWER- False
During inhalation the diaphragm contracts to pull the lungs open (T/F) - ANSWER- True
During inhalation the ribcage lifts in an upward motion to open and expand the lungs (T/F) -
ANSWER- True
As the thoracic cavity expands and lung volume increases, the density of the gases filling the lungs
decreases (T/F) - ANSWER- True
When the diaphragm rises, thoracic pressure increases and air naturally flows out of the lungs (T/F)
- ANSWER- True
Boyle's law states that gas volume is: - ANSWER- Inversely proportional to pressure.
With 100% Correct Answers | Latest 2025 Update.
How many lobes does the right human lung have? - ANSWER- three lobes
Air and food pass through which area? - ANSWER- Oropharynx
Rings of cartilage line much of the respiratory tract. In which of the following can cartilage NOT
be found? - ANSWER- Trachea
Larynx
Bronchi
Alveoli
(Alveoli)
Label B
Label D
Label E
Label F
Label G - ANSWER- B - Oral cavity
D - Epiglottis
E - Glottis
F - Trachea
G - Esophagus
Explain what happens to the Epiglottis during swallowing. Why? - 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.
OR
Trachea is closed by the Epiglottis. The Epiglottis moves inferiorly, covering the trachea. This is
to prevent food or liquid from entering the lungs.
Explain atleast TWO differences between Type I and Type II Alveolar cells - ANSWER- 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. Makeup roughly 5% of alveolar epithelial cells.
Positive pressure is used to move air into the lungs (T/F) - ANSWER- False
During inhalation the diaphragm contracts to pull the lungs open (T/F) - ANSWER- True
During inhalation the ribcage lifts in an upward motion to open and expand the lungs (T/F) -
ANSWER- True
As the thoracic cavity expands and lung volume increases, the density of the gases filling the lungs
decreases (T/F) - ANSWER- True
When the diaphragm rises, thoracic pressure increases and air naturally flows out of the lungs (T/F)
- ANSWER- True
Boyle's law states that gas volume is: - ANSWER- Inversely proportional to pressure.
