Question 1

Which of the following best describes the major function of the respiratory system?

Accepted Answer

To supply the body with $$O_2$$ and remove $$CO_2$$

Question 2

Which process is defined as the exchange of $$O_2$$ and $$CO_2$$ between the lungs and the blood?

Accepted Answer

External respiration

Question 3

A patient has a blockage in the nasopharynx. Which of the following functions would be most directly affected?

Accepted Answer

Passage of air from the nasal cavity to the oropharynx

Question 4

Which of the following is NOT a function of the nasal cavity?

Accepted Answer

Producing digestive enzymes

Question 5

A person with a deviated nasal septum may experience difficulty with which of the following?

Accepted Answer

Efficient airflow through the nasal passages

Question 6

Which structure is responsible for moving mucus upward toward the pharynx for removal?

Accepted Answer

Cilia on the respiratory mucosa

Question 7

A patient presents with nasal polyps. These are best described as:

Accepted Answer

Noncancerous growths of the nasal mucosa

Question 8

Which of the following best explains why the respiratory tract is lined with mucosa?

Accepted Answer

To trap dust and pathogens, humidify air, and facilitate olfaction

Question 9

Which of the following is a correct sequence of airflow through the respiratory tract?

Accepted Answer

Nasal cavity $$\rightarrow$$ pharynx $$\rightarrow$$ larynx $$\rightarrow$$ trachea $$\rightarrow$$ bronchi

Question 10

Which of the following best describes the function of the paranasal sinuses?

Accepted Answer

They lighten the skull and help warm and moisten air

Question 11

A patient with a blocked auditory (Eustachian) tube may experience which of the following symptoms?

Accepted Answer

Difficulty equalizing pressure in the middle ear

Question 12

Which of the following is true regarding the structural plan of the respiratory system?

Accepted Answer

It resembles an inverted hollow tree, with branches representing airways

Question 13

Which of the following best describes the function of the pharynx?

Accepted Answer

It serves as a passageway for both air and food

Question 14

A patient inhales a small particle that becomes lodged in the larynx. Which function is most at risk?

Accepted Answer

Protection of the lower respiratory tract by the epiglottis

Question 15

Which of the following is a function of the ciliated epithelium in the respiratory tract?

Accepted Answer

Moving mucus and trapped particles toward the pharynx

Question 16

If the mucociliary escalator is damaged, which of the following is most likely to occur?

Accepted Answer

Increased risk of respiratory infections

Question 17

Which of the following equations best represents the overall process of cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}$$

Question 18

Which of the following best explains why the respiratory and circulatory systems are closely linked?

Accepted Answer

The respiratory system exchanges gases with the environment, while the circulatory system transports these gases to and from tissues

Question 19

A patient with chronic sinusitis may have impaired function of which structure?

Accepted Answer

Paranasal sinuses

Question 20

Which of the following is a direct consequence of impaired external respiration?

Accepted Answer

Decreased $$O_2$$ levels in arterial blood

The Respiratory System: Structure and Function

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