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EGAN'S CHAPTER 9 - THE
RESPIRATORY SYSTEM 2026
QUESTIONS AND ANSWERS | A+
GRADED | WITH EXPERT SOLUTIONS
a. Continuous absorption of oxygen (O2) and excretion of carbon
dioxide - correct answer-What is the primary purpose of the
respiratory system?
a. Continuous absorption of oxygen (O2) and excretion of carbon
dioxide
b. Filtering to prevent allergens and microbes from reaching the
lungs
c. Transport oxygenated blood to the tissues
d. Warm and humidify inspired gas
d. Exchange of gases between the blood and the tissue - correct
answer-What is meant by "internal respiration"?
a. Any gas exchange that occurs inside the body
b. Consumption of O2
in the mitochondria
c. Continuous absorption of O2
and excretion of carbon dioxide
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d. Exchange of gases between the blood and the tissue
d. Simple diffusion - correct answer-By what mechanism does gas
exchange across the lung occur?
a. Active transport
b. Facilitated diffusion
c. Facilitated transport
d. Simple diffusion
a. It receives blood from right and left ventricles. - correct answer-
What is unique regarding the blood supply to the lung?
a. It receives blood from right and left ventricles.
b. It requires no dedicated blood supply as it exists in a gas
environment.
c. Pulmonary venous drainage contributes to the normal anatomic
shunt.
d. The pulmonary arteries are the primary source of O2 for lung
structures.
c. Protect the vital organs. - correct answer-What is the function of
the thorax?
a. Facilitate digestion.
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b. Heat, humidify, and filter gases.
c. Protect the vital organs.
d. Vocalization.
c. Parietal pleura - correct answer-What is the name of the thin
serous membrane that covers the inner layer of the
thoracic wall?
a. Cupula
b. Mesothelioma
c. Parietal pleura
d. Visceral pleura
b. Manubrium - correct answer-What is the name of the upper
portion of the sternum?
a. Angle of Louis
b. Manubrium
c. Vertebral process
d. Xiphoid process
b. At the join between the manubrium and sternal body - correct
answer-Where does the sternal angle lie?
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a. At the depression in the body of the sternum to which the
clavicles attach
b. At the join between the manubrium and sternal body
c. At the superior edge of the sternum
d. Where the xiphoid process connects to the sternum
a. Sternal angle - correct answer-What is the name of the external
landmark that identifies the point at which the trachea
branches into the right and left main stem bronchi?
a. Sternal angle
b. Cricoid cartilage
c. Suprasternal notch
d. Xiphoid process
b. 1 through 7 - correct answer-Which of rib pairs connect directly
to the sternum?
a. 1 through 4
b. 1 through 7
c. 1 through 12
d. 11 through 12
EGAN'S CHAPTER 9 - THE
RESPIRATORY SYSTEM 2026
QUESTIONS AND ANSWERS | A+
GRADED | WITH EXPERT SOLUTIONS
a. Continuous absorption of oxygen (O2) and excretion of carbon
dioxide - correct answer-What is the primary purpose of the
respiratory system?
a. Continuous absorption of oxygen (O2) and excretion of carbon
dioxide
b. Filtering to prevent allergens and microbes from reaching the
lungs
c. Transport oxygenated blood to the tissues
d. Warm and humidify inspired gas
d. Exchange of gases between the blood and the tissue - correct
answer-What is meant by "internal respiration"?
a. Any gas exchange that occurs inside the body
b. Consumption of O2
in the mitochondria
c. Continuous absorption of O2
and excretion of carbon dioxide
, Page | 2
d. Exchange of gases between the blood and the tissue
d. Simple diffusion - correct answer-By what mechanism does gas
exchange across the lung occur?
a. Active transport
b. Facilitated diffusion
c. Facilitated transport
d. Simple diffusion
a. It receives blood from right and left ventricles. - correct answer-
What is unique regarding the blood supply to the lung?
a. It receives blood from right and left ventricles.
b. It requires no dedicated blood supply as it exists in a gas
environment.
c. Pulmonary venous drainage contributes to the normal anatomic
shunt.
d. The pulmonary arteries are the primary source of O2 for lung
structures.
c. Protect the vital organs. - correct answer-What is the function of
the thorax?
a. Facilitate digestion.
, Page | 3
b. Heat, humidify, and filter gases.
c. Protect the vital organs.
d. Vocalization.
c. Parietal pleura - correct answer-What is the name of the thin
serous membrane that covers the inner layer of the
thoracic wall?
a. Cupula
b. Mesothelioma
c. Parietal pleura
d. Visceral pleura
b. Manubrium - correct answer-What is the name of the upper
portion of the sternum?
a. Angle of Louis
b. Manubrium
c. Vertebral process
d. Xiphoid process
b. At the join between the manubrium and sternal body - correct
answer-Where does the sternal angle lie?
, Page | 4
a. At the depression in the body of the sternum to which the
clavicles attach
b. At the join between the manubrium and sternal body
c. At the superior edge of the sternum
d. Where the xiphoid process connects to the sternum
a. Sternal angle - correct answer-What is the name of the external
landmark that identifies the point at which the trachea
branches into the right and left main stem bronchi?
a. Sternal angle
b. Cricoid cartilage
c. Suprasternal notch
d. Xiphoid process
b. 1 through 7 - correct answer-Which of rib pairs connect directly
to the sternum?
a. 1 through 4
b. 1 through 7
c. 1 through 12
d. 11 through 12
