Questions with Complete Solutions

Egan's Chapter 9 - The Respiratory System 80 Questions with Complete Solutions What is the primary purpose of the respiratory system?

• Continuous absorption of oxygen (O2) and excretion of carbon dioxide
• Filtering to prevent allergens and microbes from reaching the lungs
• Transport oxygenated blood to the tissues
• Warm and humidify inspired gas - Correct Answer a. Continuous absorption of oxygen (O2) and

excretion of carbon dioxide What is meant by "internal respiration"?

• Any gas exchange that occurs inside the body
• Consumption of O2

in the mitochondria

• Continuous absorption of O2

and excretion of carbon dioxide

• Exchange of gases between the blood and the tissue - Correct Answer d. Exchange of gases between

the blood and the tissue By what mechanism does gas exchange across the lung occur?

• Active transport
• Facilitated diffusion
• Facilitated transport
• Simple diffusion - Correct Answer d. Simple diffusion

What is unique regarding the blood supply to the lung?

• It receives blood from right and left ventricles.
• It requires no dedicated blood supply as it exists in a gas environment.
• Pulmonary venous drainage contributes to the normal anatomic shunt.
• The pulmonary arteries are the primary source of O2 for lung structures. - Correct Answer a. It

receives blood from right and left ventricles. 1 / 3

What is the function of the thorax?

• Facilitate digestion.
• Heat, humidify, and filter gases.
• Protect the vital organs.
• Vocalization. - Correct Answer c. Protect the vital organs.

What is the name of the thin serous membrane that covers the inner layer of the thoracic wall?

• Cupula
• Mesothelioma
• Parietal pleura
• Visceral pleura - Correct Answer c. Parietal pleura

What is the name of the upper portion of the sternum?

• Angle of Louis
• Manubrium
• Vertebral process
• Xiphoid process - Correct Answer b. Manubrium

Where does the sternal angle lie?

• At the depression in the body of the sternum to which the clavicles attach
• At the join between the manubrium and sternal body
• At the superior edge of the sternum
• Where the xiphoid process connects to the sternum - Correct Answer b. At the join between the

manubrium and sternal body 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? 2 / 3

• Sternal angle
• Cricoid cartilage
• Suprasternal notch
• Xiphoid process - Correct Answer a. Sternal angle

Which of rib pairs connect directly to the sternum?

• 1 through 4
• 1 through 7
• 1 through 12
• 11 through 12 - Correct Answer b. 1 through 7

What are rib pairs 11 and 12 known as?

• False ribs
• Faux ribs
• Floating ribs
• True ribs - Correct Answer c. Floating ribs

The intercostal arteries, veins, and nerves run through which of the following?

• Costal groove on the top of each rib
• Costal groove on the bottom of each rib
• Fibers of the intercostal musculature
• Surface of the parietal pleura - Correct Answer b. Costal groove on the bottom of each rib

Which of the following muscles are considered primary muscles of ventilation?

• Diaphragm
• Intercostals
• Scalenes
• Sternomastoid
• 1, 3, and 4
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