NUR 242 Exam 3 () | Med-
Surg Nursing | Galen College (A+
Guarantee)
,SECTION 1: RESPIRATORY DISORDERS (Questions 1-20)
Question 1
What is ventilation?
A. The circulation of blood through the lungs
B. The movement of air into and out of the lungs
C. The exchange of gases in the alveoli
D. The transport of oxygen to the tissues
Answer: B
Rationale: Ventilation is the mechanical process of moving air into and
out of the lungs. Perfusion is the circulation of blood through the lungs.
Diffusion is the exchange of gases at the alveolar-capillary level.
Question 2
What is perfusion?
A. The movement of air into and out of the lungs
B. The circulation of blood through the lungs
C. The exchange of gases in the alveoli
D. The transport of oxygen to the tissues
Answer: B
,Rationale: Perfusion is the circulation of blood through the lungs.
Ventilation and perfusion must be properly matched for adequate gas
exchange to occur.
Question 3
Central chemoreceptors are primarily responsive to which of the
following?
A. Decreased pH in the cerebrospinal fluid
B. Increased PaO₂
C. Decreased PaCO₂
D. Increased H⁺ in the brain ECF and increased PaCO₂
Answer: D
Rationale: Central chemoreceptors are responsive to increased H⁺ in
the brain extracellular fluid and increased PaCO₂, which is known as the
"hypercarbic drive".
Question 4
Peripheral chemoreceptors are responsive to which of the following?
(Select all that apply.)
A. Decreased pH
B. Increased PaCO₂
, C. Decreased PaO₂
D. Increased pH
Answer: A, B, C
Rationale: Peripheral chemoreceptors are responsive to decreased pH,
increased PaCO₂, and decreased PaO₂, which is known as the "hypoxic
drive".
Question 5
A home health patient with asthma has a peak expiratory flow (PEF)
reading in the red zone. What is the priority nursing action?
A. Repeat the PEF reading to verify the results
B. Take the patient's vital signs
C. Call 911 immediately
D. Notify the patient's prescriber
Answer: C
Rationale: A PEF reading in the red zone indicates severe airway
obstruction requiring immediate emergency attention. The patient
should be instructed to call 911 or be transported to the emergency
department immediately.
Question 6
Surg Nursing | Galen College (A+
Guarantee)
,SECTION 1: RESPIRATORY DISORDERS (Questions 1-20)
Question 1
What is ventilation?
A. The circulation of blood through the lungs
B. The movement of air into and out of the lungs
C. The exchange of gases in the alveoli
D. The transport of oxygen to the tissues
Answer: B
Rationale: Ventilation is the mechanical process of moving air into and
out of the lungs. Perfusion is the circulation of blood through the lungs.
Diffusion is the exchange of gases at the alveolar-capillary level.
Question 2
What is perfusion?
A. The movement of air into and out of the lungs
B. The circulation of blood through the lungs
C. The exchange of gases in the alveoli
D. The transport of oxygen to the tissues
Answer: B
,Rationale: Perfusion is the circulation of blood through the lungs.
Ventilation and perfusion must be properly matched for adequate gas
exchange to occur.
Question 3
Central chemoreceptors are primarily responsive to which of the
following?
A. Decreased pH in the cerebrospinal fluid
B. Increased PaO₂
C. Decreased PaCO₂
D. Increased H⁺ in the brain ECF and increased PaCO₂
Answer: D
Rationale: Central chemoreceptors are responsive to increased H⁺ in
the brain extracellular fluid and increased PaCO₂, which is known as the
"hypercarbic drive".
Question 4
Peripheral chemoreceptors are responsive to which of the following?
(Select all that apply.)
A. Decreased pH
B. Increased PaCO₂
, C. Decreased PaO₂
D. Increased pH
Answer: A, B, C
Rationale: Peripheral chemoreceptors are responsive to decreased pH,
increased PaCO₂, and decreased PaO₂, which is known as the "hypoxic
drive".
Question 5
A home health patient with asthma has a peak expiratory flow (PEF)
reading in the red zone. What is the priority nursing action?
A. Repeat the PEF reading to verify the results
B. Take the patient's vital signs
C. Call 911 immediately
D. Notify the patient's prescriber
Answer: C
Rationale: A PEF reading in the red zone indicates severe airway
obstruction requiring immediate emergency attention. The patient
should be instructed to call 911 or be transported to the emergency
department immediately.
Question 6
