ATI RN
Respiratory System Practice Questions Questions
Question 1 of 5
Which membrane is in contact with the lung surface?
Correct Answer: B
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 2 of 5
What is the total volume of air accommodated in the lungs at the end of a forced inspiration called?
Correct Answer: A
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 3 of 5
What are the three major layers that make up the diffusion membrane for gas exchange in the respiratory system?
Correct Answer: C
Rationale: The diffusion membrane for gas exchange in the respiratory system is composed of three major layers: the thin squamous epithelium of the alveoli, the endothelium of the alveolar capillaries, and the basement substance that lies between them. These layers together form a thin barrier through which gases can easily diffuse during respiration.
Question 4 of 5
What is the approximate percentage of oxygen (O₂) carried in a dissolved state through the plasma in the blood?
Correct Answer: D
Rationale: Around 97% of oxygen (O₂) is carried in the blood by binding to red blood cells (RBCs). The remaining 3% is transported in a dissolved state through the plasma. While dissolved O₂ plays a minor role in overall oxygen transport, it contributes to maintaining the partial pressure of oxygen in the blood.
Question 5 of 5
Which gas has an insignificant role in the regulation of respiratory rhythm?
Correct Answer: A
Rationale: According to the information provided, the role of oxygen in the regulation of respiratory rhythm is insignificant. While oxygen levels are important for the overall functioning of the respiratory system, the primary factors that influence the respiratory rhythm are changes in carbon dioxide (CO₂) and hydrogen ion concentrations. Oxygen levels are primarily monitored by the peripheral chemoreceptors for maintaining oxygen homeostasis, but they do not play a significant role in directly regulating the respiratory rhythm.