NURS 5315 Pulmonary, Respiratory
Advanced Pathophysiology Exam Latest
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SECTION 1: RESPIRATORY PHYSIOLOGY & VENTILATION
1. Which of the following best describes respiration?
• A) The mechanical process of moving air in and out of the lungs
• B) The exchange of gases between the environment and the cells of the
body
• C) The contraction and relaxation of the diaphragm
• D) The movement of oxygen into the lungs through the trachea
Answer: B
Respiration is a biochemical process that involves gas exchange at the cellular
level, including both external and internal respiration .
2. What is the primary driver of ventilation?
• A) Diffusion of gases across the alveoli
• B) Contraction and relaxation of the diaphragm and intercostal muscles
• C) Hemoglobin saturation levels
• D) Carbonic anhydrase activity in red blood cells
,Answer: B
Ventilation refers to the mechanical process of air movement, which is primarily
controlled by muscle contraction and relaxation .
3. Where does gas exchange primarily occur in the lungs?
• A) Trachea
• B) Bronchioles
• C) Alveoli
• D) Pharynx
Answer: C
The alveoli are the primary site for gas exchange due to their thin walls and
extensive capillary network .
4. Which law explains the diffusion of gases across the alveolar-capillary
membrane?
• A) Boyle's Law
• B) Henry's Law
• C) Fick's Law
• D) Dalton's Law
Answer: C
Fick's Law states that gas diffusion depends on surface area, membrane thickness,
and partial pressure gradients .
5. What determines the direction of oxygen diffusion in the lungs?
, • A) The volume of air in the lungs
• B) The concentration gradient between alveolar air and blood
• C) The presence of surfactant in the alveoli
• D) The amount of hemoglobin in red blood cells
Answer: B
Oxygen moves from high partial pressure in the alveoli to the lower partial
pressure in the pulmonary capillaries .
6. How is most oxygen transported in the blood?
• A) Dissolved in plasma
• B) Bound to hemoglobin
• C) Converted to bicarbonate
• D) As carbonic acid
Answer: B
About 98.5% of oxygen is bound to hemoglobin in red blood cells .
7. What percentage of carbon dioxide is transported as bicarbonate?
• A) 10%
• B) 23%
• C) 70%
• D) 98.5%
Answer: C
The majority of CO₂ (about 70%) is converted into bicarbonate in red blood cells for
transport .
, 8. Which factor shifts the oxygen-hemoglobin dissociation curve to the right,
facilitating oxygen release?
• A) Decreased temperature
• B) Increased pH
• C) Increased CO₂ levels
• D) Decreased 2,3-BPG levels
Answer: C
Increased CO₂ levels lower pH (Bohr effect), shifting the curve right and promoting
oxygen unloading .
9. Which structure is considered extra-thoracic?
• A) Trachea
• B) Pharynx
• C) Bronchioles
• D) Alveoli
Answer: B
The pharynx is an upper airway structure located outside the thoracic cavity .
10. The dorsal respiratory group (DRG) and ventral respiratory group (VRG) are
located in the _____ and are responsible for controlling breathing patterns.
• A) Pons
• B) Medulla
• C) Cerebellum
Advanced Pathophysiology Exam Latest
2026 Newest Questions and Answers
(Latest Update) (Verified
Answers)
SECTION 1: RESPIRATORY PHYSIOLOGY & VENTILATION
1. Which of the following best describes respiration?
• A) The mechanical process of moving air in and out of the lungs
• B) The exchange of gases between the environment and the cells of the
body
• C) The contraction and relaxation of the diaphragm
• D) The movement of oxygen into the lungs through the trachea
Answer: B
Respiration is a biochemical process that involves gas exchange at the cellular
level, including both external and internal respiration .
2. What is the primary driver of ventilation?
• A) Diffusion of gases across the alveoli
• B) Contraction and relaxation of the diaphragm and intercostal muscles
• C) Hemoglobin saturation levels
• D) Carbonic anhydrase activity in red blood cells
,Answer: B
Ventilation refers to the mechanical process of air movement, which is primarily
controlled by muscle contraction and relaxation .
3. Where does gas exchange primarily occur in the lungs?
• A) Trachea
• B) Bronchioles
• C) Alveoli
• D) Pharynx
Answer: C
The alveoli are the primary site for gas exchange due to their thin walls and
extensive capillary network .
4. Which law explains the diffusion of gases across the alveolar-capillary
membrane?
• A) Boyle's Law
• B) Henry's Law
• C) Fick's Law
• D) Dalton's Law
Answer: C
Fick's Law states that gas diffusion depends on surface area, membrane thickness,
and partial pressure gradients .
5. What determines the direction of oxygen diffusion in the lungs?
, • A) The volume of air in the lungs
• B) The concentration gradient between alveolar air and blood
• C) The presence of surfactant in the alveoli
• D) The amount of hemoglobin in red blood cells
Answer: B
Oxygen moves from high partial pressure in the alveoli to the lower partial
pressure in the pulmonary capillaries .
6. How is most oxygen transported in the blood?
• A) Dissolved in plasma
• B) Bound to hemoglobin
• C) Converted to bicarbonate
• D) As carbonic acid
Answer: B
About 98.5% of oxygen is bound to hemoglobin in red blood cells .
7. What percentage of carbon dioxide is transported as bicarbonate?
• A) 10%
• B) 23%
• C) 70%
• D) 98.5%
Answer: C
The majority of CO₂ (about 70%) is converted into bicarbonate in red blood cells for
transport .
, 8. Which factor shifts the oxygen-hemoglobin dissociation curve to the right,
facilitating oxygen release?
• A) Decreased temperature
• B) Increased pH
• C) Increased CO₂ levels
• D) Decreased 2,3-BPG levels
Answer: C
Increased CO₂ levels lower pH (Bohr effect), shifting the curve right and promoting
oxygen unloading .
9. Which structure is considered extra-thoracic?
• A) Trachea
• B) Pharynx
• C) Bronchioles
• D) Alveoli
Answer: B
The pharynx is an upper airway structure located outside the thoracic cavity .
10. The dorsal respiratory group (DRG) and ventral respiratory group (VRG) are
located in the _____ and are responsible for controlling breathing patterns.
• A) Pons
• B) Medulla
• C) Cerebellum
