Gas exchange and Oxygenation ATI
Questions and Answers | Latest Version
| 2025/2026 | Correct & Verified
What is the main function of the respiratory system in relation to gas exchange?
✔✔To facilitate the exchange of oxygen and carbon dioxide between the lungs and blood.
What is the role of hemoglobin in oxygenation?
✔✔Hemoglobin binds with oxygen in the lungs and carries it to the tissues.
What is the primary consequence of impaired gas exchange?
✔✔Decreased oxygen supply to tissues, leading to hypoxia.
How does the body respond to hypoxia in the early stages?
✔✔Increased respiratory rate and depth to improve oxygen intake.
What is the significance of the partial pressure of oxygen (PaO₂) in assessing oxygenation status?
✔✔It measures the amount of oxygen dissolved in the blood, indicating the efficiency of gas
exchange in the lungs.
1
, What is the role of surfactant in the lungs?
✔✔It reduces surface tension in the alveoli, preventing collapse and ensuring efficient gas
exchange.
How does emphysema affect gas exchange?
✔✔It destroys alveolar walls, reducing surface area for gas exchange and impairing oxygen
uptake.
What is the primary difference between ventilation and perfusion?
✔✔Ventilation is the movement of air into and out of the lungs, while perfusion is the flow of
blood through the lungs to exchange gases.
How does pulmonary edema impact oxygenation?
✔✔It impairs gas exchange by filling the alveoli with fluid, hindering oxygen absorption and
carbon dioxide elimination.
What is the normal range for oxygen saturation in a healthy adult?
✔✔95% to 100%.
2
Questions and Answers | Latest Version
| 2025/2026 | Correct & Verified
What is the main function of the respiratory system in relation to gas exchange?
✔✔To facilitate the exchange of oxygen and carbon dioxide between the lungs and blood.
What is the role of hemoglobin in oxygenation?
✔✔Hemoglobin binds with oxygen in the lungs and carries it to the tissues.
What is the primary consequence of impaired gas exchange?
✔✔Decreased oxygen supply to tissues, leading to hypoxia.
How does the body respond to hypoxia in the early stages?
✔✔Increased respiratory rate and depth to improve oxygen intake.
What is the significance of the partial pressure of oxygen (PaO₂) in assessing oxygenation status?
✔✔It measures the amount of oxygen dissolved in the blood, indicating the efficiency of gas
exchange in the lungs.
1
, What is the role of surfactant in the lungs?
✔✔It reduces surface tension in the alveoli, preventing collapse and ensuring efficient gas
exchange.
How does emphysema affect gas exchange?
✔✔It destroys alveolar walls, reducing surface area for gas exchange and impairing oxygen
uptake.
What is the primary difference between ventilation and perfusion?
✔✔Ventilation is the movement of air into and out of the lungs, while perfusion is the flow of
blood through the lungs to exchange gases.
How does pulmonary edema impact oxygenation?
✔✔It impairs gas exchange by filling the alveoli with fluid, hindering oxygen absorption and
carbon dioxide elimination.
What is the normal range for oxygen saturation in a healthy adult?
✔✔95% to 100%.
2
