MSN 570 Week 3 Quiz | Questions and
Answers | 2026/27 Updated | 100% Correct -
USU.
MSN 570 Week 3 Quiz
100 Practice Questions with Answers & Rationales | 2026/27 Updated | United
States University
Number of Questions: 100
Time Allowed: 120 minutes
Answer Key & Rationales: Provided after each question
SECTION 1: RESPIRATORY PATHOPHYSIOLOGY
Questions 1–20
1. Which of the following structures connects the larynx to the bronchi?
A) Pharynx
B) Trachea
C) Bronchioles
D) Alveoli
Answer: B. Trachea
Rationale: The trachea connects the larynx to the bronchi. It is a flexible tube
composed of C-shaped cartilage rings that keep the airway patent. The trachea
,descends from the larynx at the level of the cricoid cartilage (C6) and bifurcates
into the right and left main bronchi at the level of the carina (T4) .
2. Which of the following is most likely an intervention associated with
pneumonia?
A) Humidified oxygen
B) Deep breathing exercises
C) Position of comfort
D) All of the above
Answer: D. All of the above
Rationale: Pneumonia interventions include humidified oxygen, deep breathing
exercises, positioning the patient for comfort, increasing fluid intake, and
managing fever. Humidified oxygen improves oxygenation and loosens secretions.
Deep breathing exercises promote alveolar recruitment and prevent atelectasis .
3. Which of the following is a characteristic most likely associated with
myoglobin?
A) Peak elevation 24 hours after infarction
B) Related to muscle injury
C) Both A and B
D) Neither A nor B
Answer: C. Both A and B
Rationale: Myoglobin is a heme protein found in skeletal and cardiac muscle. It
peaks 24 hours after infarction and is related to muscle injury. Myoglobin is an
early marker of muscle damage, rising within 1-3 hours of injury, peaking at
approximately 24 hours, and returning to normal within 1-2 days. However, it is
not cardiac-specific .
,4. What assessment finding may be seen in patients with pneumonia?
A) Wheezing or crackles
B) Fever
C) Cough with sputum production
D) All of the above
Answer: D. All of the above
Rationale: Patients with pneumonia may present with shortness of breath,
wheezing or crackles on auscultation, fever, pleuritic chest pain, hypoxemia, and
cough with sputum production. Crackles result from fluid-filled alveoli, while
wheezing may indicate airway narrowing .
5. Which of the following variables is primarily altered in a person who suffers
from pulmonary fibrosis?
A) Decreased airway resistance
B) Increased thickness of the respiratory membrane
C) Decreased total lung capacity
D) Increased compliance
Answer: B. Increased thickness of the respiratory membrane
Rationale: Pulmonary fibrosis is characterized by increased thickness of the
respiratory membrane due to deposition of fibrous tissue. This thickening impairs
gas exchange by increasing the diffusion distance for oxygen and carbon dioxide.
6. Which of the following statements about pulmonary fibrosis is NOT correct?
A) Persons with pulmonary fibrosis have an increased total lung capacity
B) Pulmonary fibrosis is characterized by thickening of the alveolar walls
C) The condition leads to decreased diffusion capacity
D) Fibrosis results from chronic inflammation and tissue repair
, Answer: A. Persons with pulmonary fibrosis have an increased total lung
capacity
Rationale: In pulmonary fibrosis, total lung capacity is decreased, not increased.
The fibrotic changes cause the lungs to become stiff and restrictive, reducing the
ability to expand.
7. What is the primary problem resulting from respiratory distress syndrome
(RDS) of the newborn?
A) Immature immune system
B) Small alveoli
C) Surfactant deficiency
D) Bronchiolar plugging
Answer: C. Surfactant deficiency
Rationale: Respiratory distress syndrome (RDS) of the newborn is primarily caused
by surfactant deficiency, leading to alveolar collapse and increased surface
tension.
8. Which of the following respiratory structures would be found in the
respiratory zone?
A) Trachea
B) Bronchi
C) Alveoli
D) Larynx
Answer: C. Alveoli
Rationale: The respiratory zone is where gas exchange occurs and includes the
respiratory bronchioles, alveolar ducts, and alveoli.
Answers | 2026/27 Updated | 100% Correct -
USU.
MSN 570 Week 3 Quiz
100 Practice Questions with Answers & Rationales | 2026/27 Updated | United
States University
Number of Questions: 100
Time Allowed: 120 minutes
Answer Key & Rationales: Provided after each question
SECTION 1: RESPIRATORY PATHOPHYSIOLOGY
Questions 1–20
1. Which of the following structures connects the larynx to the bronchi?
A) Pharynx
B) Trachea
C) Bronchioles
D) Alveoli
Answer: B. Trachea
Rationale: The trachea connects the larynx to the bronchi. It is a flexible tube
composed of C-shaped cartilage rings that keep the airway patent. The trachea
,descends from the larynx at the level of the cricoid cartilage (C6) and bifurcates
into the right and left main bronchi at the level of the carina (T4) .
2. Which of the following is most likely an intervention associated with
pneumonia?
A) Humidified oxygen
B) Deep breathing exercises
C) Position of comfort
D) All of the above
Answer: D. All of the above
Rationale: Pneumonia interventions include humidified oxygen, deep breathing
exercises, positioning the patient for comfort, increasing fluid intake, and
managing fever. Humidified oxygen improves oxygenation and loosens secretions.
Deep breathing exercises promote alveolar recruitment and prevent atelectasis .
3. Which of the following is a characteristic most likely associated with
myoglobin?
A) Peak elevation 24 hours after infarction
B) Related to muscle injury
C) Both A and B
D) Neither A nor B
Answer: C. Both A and B
Rationale: Myoglobin is a heme protein found in skeletal and cardiac muscle. It
peaks 24 hours after infarction and is related to muscle injury. Myoglobin is an
early marker of muscle damage, rising within 1-3 hours of injury, peaking at
approximately 24 hours, and returning to normal within 1-2 days. However, it is
not cardiac-specific .
,4. What assessment finding may be seen in patients with pneumonia?
A) Wheezing or crackles
B) Fever
C) Cough with sputum production
D) All of the above
Answer: D. All of the above
Rationale: Patients with pneumonia may present with shortness of breath,
wheezing or crackles on auscultation, fever, pleuritic chest pain, hypoxemia, and
cough with sputum production. Crackles result from fluid-filled alveoli, while
wheezing may indicate airway narrowing .
5. Which of the following variables is primarily altered in a person who suffers
from pulmonary fibrosis?
A) Decreased airway resistance
B) Increased thickness of the respiratory membrane
C) Decreased total lung capacity
D) Increased compliance
Answer: B. Increased thickness of the respiratory membrane
Rationale: Pulmonary fibrosis is characterized by increased thickness of the
respiratory membrane due to deposition of fibrous tissue. This thickening impairs
gas exchange by increasing the diffusion distance for oxygen and carbon dioxide.
6. Which of the following statements about pulmonary fibrosis is NOT correct?
A) Persons with pulmonary fibrosis have an increased total lung capacity
B) Pulmonary fibrosis is characterized by thickening of the alveolar walls
C) The condition leads to decreased diffusion capacity
D) Fibrosis results from chronic inflammation and tissue repair
, Answer: A. Persons with pulmonary fibrosis have an increased total lung
capacity
Rationale: In pulmonary fibrosis, total lung capacity is decreased, not increased.
The fibrotic changes cause the lungs to become stiff and restrictive, reducing the
ability to expand.
7. What is the primary problem resulting from respiratory distress syndrome
(RDS) of the newborn?
A) Immature immune system
B) Small alveoli
C) Surfactant deficiency
D) Bronchiolar plugging
Answer: C. Surfactant deficiency
Rationale: Respiratory distress syndrome (RDS) of the newborn is primarily caused
by surfactant deficiency, leading to alveolar collapse and increased surface
tension.
8. Which of the following respiratory structures would be found in the
respiratory zone?
A) Trachea
B) Bronchi
C) Alveoli
D) Larynx
Answer: C. Alveoli
Rationale: The respiratory zone is where gas exchange occurs and includes the
respiratory bronchioles, alveolar ducts, and alveoli.
