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NURS 3209 OXYGENATION EXAM PRACTICE 2026/2027
COMPLETE (100) CURRENT TESTING QUESTIONS AND
CORRECT ANSWERS WITH DETAILED RATIONALES.
NURS
Prepare for the NURS 3209 Mobility and Positioning Exam Practice with a focused
study resource designed to reinforce essential nursing concepts related to mobility,
positioning, and safe patient care. It supports review of body mechanics, positioning
techniques, transfers, ambulation, assistive devices, range-of-motion exercises, fall
prevention, and prevention of complications associated with immobility. Use the
practice material to strengthen clinical judgment, improve understanding of safe
mobility practices, and identify areas that may require additional review before the
exam. This resource is best suited for NURS 3209 nursing students and healthcare
learners preparing for mobility and positioning assessments.
MULTIPLE CHOICE.
SECTION 1: FUNDAMENTALS OF OXYGENATION & PERFUSION
1. Which of the following best defines oxygenation?
• A) The movement of blood through the pulmonary circulation
• B) The process of delivering oxygen to the cells and tissues of the body
• C) The exchange of gases in the alveoli
• D) The removal of carbon dioxide from the body
Answer: B
Rationale: Oxygenation is the process of delivering oxygen to the cells and
tissues of the body. It involves ventilation (movement of air in and out of
the lungs), diffusion (gas exchange in the alveoli), and perfusion
(movement of blood through the pulmonary capillaries).
2. A patient's SpO₂ is 88% on room air. The nurse should interpret this as:
• A) Normal oxygenation
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• B) Mild hypoxemia
• C) Moderate hypoxemia
• D) Severe hypoxemia
Answer: C
Rationale: An SpO₂ of 88% is considered moderate hypoxemia (85-89%).
Normal SpO₂ is 95-100%. Mild hypoxemia is 90-94%. Severe hypoxemia is
< 85%. This patient requires intervention, such as supplemental oxygen.
3. A patient with COPD should have their oxygen saturation maintained at:
• A) 80-85%
• B) 85-88%
• C) 88-92%
• D) 95-100%
Answer: C
Rationale: For patients with COPD, the target SpO₂ is 88-92%. This is
because COPD patients often retain CO₂ and rely on a hypoxic drive to
stimulate breathing. Higher oxygen levels may suppress their respiratory
drive and worsen respiratory acidosis.
4. The exchange of oxygen and carbon dioxide in the lungs occurs at the
level of the:
• A) Trachea
• B) Bronchi
• C) Bronchioles
• D) Alveoli
Answer: D
Rationale: Gas exchange occurs in the alveoli, where oxygen diffuses
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from the alveoli into the pulmonary capillaries and carbon dioxide
diffuses from the blood into the alveoli. The alveoli have a large surface
area and thin walls to facilitate gas exchange.
5. A patient has a PaO₂ of 55 mmHg on an arterial blood gas (ABG). The
nurse should interpret this as:
• A) Normal oxygenation
• B) Hypoxemia
• C) Hyperoxemia
• D) No abnormality
Answer: B
Rationale: A PaO₂ of 55 mmHg is below the normal range (80-100 mmHg)
and indicates hypoxemia. A PaO₂ < 60 mmHg is often the threshold for
initiating supplemental oxygen therapy.
6. Which of the following is a sign of hypoxia?
• A) Cyanosis
• B) Restlessness
• C) Tachycardia
• D) All of the above
Answer: D
Rationale: Signs of hypoxia include cyanosis (bluish discoloration of skin
and mucous membranes), restlessness, confusion, tachycardia,
tachypnea, and diaphoresis. Early signs include restlessness and anxiety;
cyanosis is a late sign.
7. The normal partial pressure of oxygen (PaO₂) in arterial blood is:
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• A) 35-45 mmHg
• B) 60-70 mmHg
• C) 80-100 mmHg
• D) 100-120 mmHg
Answer: C
Rationale: The normal PaO₂ is 80-100 mmHg. Values below 80 mmHg
indicate hypoxemia. Values may be lower in older adults or at higher
altitudes. PaO₂ is an important indicator of oxygenation status.
8. Which of the following is the primary stimulus for breathing in a healthy
individual?
• A) Low oxygen levels (hypoxemia)
• B) High carbon dioxide levels (hypercapnia)
• C) Low carbon dioxide levels (hypocapnia)
• D) Low pH (acidosis)
Answer: B
Rationale: In a healthy individual, the primary stimulus for breathing is an
elevated partial pressure of carbon dioxide (PaCO₂) in the blood, which
stimulates the respiratory centers in the brainstem. In patients with
COPD, the hypoxic drive may become the primary stimulus.
9. The respiratory center is located in the:
• A) Cerebral cortex
• B) Medulla oblongata and pons
• C) Cerebellum
• D) Spinal cord
NURS 3209 OXYGENATION EXAM PRACTICE 2026/2027
COMPLETE (100) CURRENT TESTING QUESTIONS AND
CORRECT ANSWERS WITH DETAILED RATIONALES.
NURS
Prepare for the NURS 3209 Mobility and Positioning Exam Practice with a focused
study resource designed to reinforce essential nursing concepts related to mobility,
positioning, and safe patient care. It supports review of body mechanics, positioning
techniques, transfers, ambulation, assistive devices, range-of-motion exercises, fall
prevention, and prevention of complications associated with immobility. Use the
practice material to strengthen clinical judgment, improve understanding of safe
mobility practices, and identify areas that may require additional review before the
exam. This resource is best suited for NURS 3209 nursing students and healthcare
learners preparing for mobility and positioning assessments.
MULTIPLE CHOICE.
SECTION 1: FUNDAMENTALS OF OXYGENATION & PERFUSION
1. Which of the following best defines oxygenation?
• A) The movement of blood through the pulmonary circulation
• B) The process of delivering oxygen to the cells and tissues of the body
• C) The exchange of gases in the alveoli
• D) The removal of carbon dioxide from the body
Answer: B
Rationale: Oxygenation is the process of delivering oxygen to the cells and
tissues of the body. It involves ventilation (movement of air in and out of
the lungs), diffusion (gas exchange in the alveoli), and perfusion
(movement of blood through the pulmonary capillaries).
2. A patient's SpO₂ is 88% on room air. The nurse should interpret this as:
• A) Normal oxygenation
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• B) Mild hypoxemia
• C) Moderate hypoxemia
• D) Severe hypoxemia
Answer: C
Rationale: An SpO₂ of 88% is considered moderate hypoxemia (85-89%).
Normal SpO₂ is 95-100%. Mild hypoxemia is 90-94%. Severe hypoxemia is
< 85%. This patient requires intervention, such as supplemental oxygen.
3. A patient with COPD should have their oxygen saturation maintained at:
• A) 80-85%
• B) 85-88%
• C) 88-92%
• D) 95-100%
Answer: C
Rationale: For patients with COPD, the target SpO₂ is 88-92%. This is
because COPD patients often retain CO₂ and rely on a hypoxic drive to
stimulate breathing. Higher oxygen levels may suppress their respiratory
drive and worsen respiratory acidosis.
4. The exchange of oxygen and carbon dioxide in the lungs occurs at the
level of the:
• A) Trachea
• B) Bronchi
• C) Bronchioles
• D) Alveoli
Answer: D
Rationale: Gas exchange occurs in the alveoli, where oxygen diffuses
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from the alveoli into the pulmonary capillaries and carbon dioxide
diffuses from the blood into the alveoli. The alveoli have a large surface
area and thin walls to facilitate gas exchange.
5. A patient has a PaO₂ of 55 mmHg on an arterial blood gas (ABG). The
nurse should interpret this as:
• A) Normal oxygenation
• B) Hypoxemia
• C) Hyperoxemia
• D) No abnormality
Answer: B
Rationale: A PaO₂ of 55 mmHg is below the normal range (80-100 mmHg)
and indicates hypoxemia. A PaO₂ < 60 mmHg is often the threshold for
initiating supplemental oxygen therapy.
6. Which of the following is a sign of hypoxia?
• A) Cyanosis
• B) Restlessness
• C) Tachycardia
• D) All of the above
Answer: D
Rationale: Signs of hypoxia include cyanosis (bluish discoloration of skin
and mucous membranes), restlessness, confusion, tachycardia,
tachypnea, and diaphoresis. Early signs include restlessness and anxiety;
cyanosis is a late sign.
7. The normal partial pressure of oxygen (PaO₂) in arterial blood is:
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• A) 35-45 mmHg
• B) 60-70 mmHg
• C) 80-100 mmHg
• D) 100-120 mmHg
Answer: C
Rationale: The normal PaO₂ is 80-100 mmHg. Values below 80 mmHg
indicate hypoxemia. Values may be lower in older adults or at higher
altitudes. PaO₂ is an important indicator of oxygenation status.
8. Which of the following is the primary stimulus for breathing in a healthy
individual?
• A) Low oxygen levels (hypoxemia)
• B) High carbon dioxide levels (hypercapnia)
• C) Low carbon dioxide levels (hypocapnia)
• D) Low pH (acidosis)
Answer: B
Rationale: In a healthy individual, the primary stimulus for breathing is an
elevated partial pressure of carbon dioxide (PaCO₂) in the blood, which
stimulates the respiratory centers in the brainstem. In patients with
COPD, the hypoxic drive may become the primary stimulus.
9. The respiratory center is located in the:
• A) Cerebral cortex
• B) Medulla oblongata and pons
• C) Cerebellum
• D) Spinal cord
