M2: Exam- Requires Respondus LockDown
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Question 1
4 / 4 pts
How many lobes does the right human lung have?
Your Answer:
Three lobes.
Three
... [Show More] 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. [Show Less]