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NUR 1136 Unit 4 Exam — Comprehensive Practice Questions (2026–2027)
Graded A+ | Original Questions & Answers with Detailed Rationales
This practice exam covers the core content typically included in NUR
1136 Unit 4: Oxygenation & Respiratory Care; Fluid, Electrolyte & Acid-
Base Balance; Renal & Urinary Disorders; and Management of Care.
Each question includes a correct answer and a detailed rationale.
SECTION A: OXYGENATION & RESPIRATORY CARE (Questions)
Question 1
What is oxygenation?
A. The process of delivering oxygen to the blood by diffusion
from the alveoli
B. The process of removing carbon dioxide from the blood
C. The process of circulating blood throughout the body
D. The process of filtering waste products from the blood
Correct Answer: A
Rationale: Oxygenation is the process of delivering oxygen to
the blood by diffusion from the alveoli following inhalation into
the lungs.
Question 2
What is the primary function of the respiratory system?
A. To exchange oxygen and carbon dioxide
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B. To regulate blood pressure
C. To digest food
D. To filter blood
Correct Answer: A
Rationale: The primary function of the respiratory system is to
exchange oxygen and carbon dioxide.
Question 3
What is ventilation?
A. The movement of air into and out of the lungs
B. The exchange of oxygen and carbon dioxide
C. The transport of oxygen in the blood
D. The regulation of breathing
Correct Answer: A
Rationale: Ventilation is the movement of air into and out of
the lungs.
Question 4
What is diffusion?
A. The movement of gases across the alveolar-capillary
membrane
B. The movement of air into the lungs
C. The movement of blood through the heart
D. The movement of oxygen through the bloodstream
Correct Answer: A
Rationale: Diffusion is the movement of gases across the
alveolar-capillary membrane.
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Question 5
What is perfusion?
A. The movement of blood through the pulmonary capillaries
B. The movement of air into the lungs
C. The exchange of gases in the alveoli
D. The regulation of breathing
Correct Answer: A
Rationale: Perfusion is the movement of blood through the
pulmonary capillaries, allowing gas exchange.
Question 6
What is the normal respiratory rate for adults?
A. 8–12 breaths/min
B. 12–20 breaths/min
C. 20–30 breaths/min
D. 30–40 breaths/min
Correct Answer: B
Rationale: The normal adult respiratory rate is 12–20 breaths
per minute.
Question 7
What is tachypnea?
A. Respiratory rate less than 12 breaths/min
B. Respiratory rate greater than 20 breaths/min
C. Heart rate less than 60 bpm
D. Heart rate greater than 100 bpm
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Correct Answer: B
Rationale: Tachypnea is a respiratory rate greater than 20
breaths per minute.
Question 8
What is bradypnea?
A. Respiratory rate less than 12 breaths/min
B. Respiratory rate greater than 20 breaths/min
C. Heart rate less than 60 bpm
D. Heart rate greater than 100 bpm
Correct Answer: A
Rationale: Bradypnea is a respiratory rate less than 12 breaths
per minute.
Question 9
What is dyspnea?
A. Difficulty breathing
B. Rapid breathing
C. Slow breathing
D. Absence of breathing
Correct Answer: A
Rationale: Dyspnea is difficulty breathing or shortness of
breath.
Question 10
What is orthopnea?
A. Difficulty breathing when lying flat
B. Difficulty breathing when sitting up
NUR 1136 Unit 4 Exam — Comprehensive Practice Questions (2026–2027)
Graded A+ | Original Questions & Answers with Detailed Rationales
This practice exam covers the core content typically included in NUR
1136 Unit 4: Oxygenation & Respiratory Care; Fluid, Electrolyte & Acid-
Base Balance; Renal & Urinary Disorders; and Management of Care.
Each question includes a correct answer and a detailed rationale.
SECTION A: OXYGENATION & RESPIRATORY CARE (Questions)
Question 1
What is oxygenation?
A. The process of delivering oxygen to the blood by diffusion
from the alveoli
B. The process of removing carbon dioxide from the blood
C. The process of circulating blood throughout the body
D. The process of filtering waste products from the blood
Correct Answer: A
Rationale: Oxygenation is the process of delivering oxygen to
the blood by diffusion from the alveoli following inhalation into
the lungs.
Question 2
What is the primary function of the respiratory system?
A. To exchange oxygen and carbon dioxide
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B. To regulate blood pressure
C. To digest food
D. To filter blood
Correct Answer: A
Rationale: The primary function of the respiratory system is to
exchange oxygen and carbon dioxide.
Question 3
What is ventilation?
A. The movement of air into and out of the lungs
B. The exchange of oxygen and carbon dioxide
C. The transport of oxygen in the blood
D. The regulation of breathing
Correct Answer: A
Rationale: Ventilation is the movement of air into and out of
the lungs.
Question 4
What is diffusion?
A. The movement of gases across the alveolar-capillary
membrane
B. The movement of air into the lungs
C. The movement of blood through the heart
D. The movement of oxygen through the bloodstream
Correct Answer: A
Rationale: Diffusion is the movement of gases across the
alveolar-capillary membrane.
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Question 5
What is perfusion?
A. The movement of blood through the pulmonary capillaries
B. The movement of air into the lungs
C. The exchange of gases in the alveoli
D. The regulation of breathing
Correct Answer: A
Rationale: Perfusion is the movement of blood through the
pulmonary capillaries, allowing gas exchange.
Question 6
What is the normal respiratory rate for adults?
A. 8–12 breaths/min
B. 12–20 breaths/min
C. 20–30 breaths/min
D. 30–40 breaths/min
Correct Answer: B
Rationale: The normal adult respiratory rate is 12–20 breaths
per minute.
Question 7
What is tachypnea?
A. Respiratory rate less than 12 breaths/min
B. Respiratory rate greater than 20 breaths/min
C. Heart rate less than 60 bpm
D. Heart rate greater than 100 bpm
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Correct Answer: B
Rationale: Tachypnea is a respiratory rate greater than 20
breaths per minute.
Question 8
What is bradypnea?
A. Respiratory rate less than 12 breaths/min
B. Respiratory rate greater than 20 breaths/min
C. Heart rate less than 60 bpm
D. Heart rate greater than 100 bpm
Correct Answer: A
Rationale: Bradypnea is a respiratory rate less than 12 breaths
per minute.
Question 9
What is dyspnea?
A. Difficulty breathing
B. Rapid breathing
C. Slow breathing
D. Absence of breathing
Correct Answer: A
Rationale: Dyspnea is difficulty breathing or shortness of
breath.
Question 10
What is orthopnea?
A. Difficulty breathing when lying flat
B. Difficulty breathing when sitting up
