CCRN : Identifying, Monitoring, Providing Care, and Administering Medication to Treat Pulmonary Diseases

Study concepts, example questions & explanations for CCRN

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Example Questions

Example Question #1 : Ccrn

The process of ventilation has four phases. Which of the following correctly describes the events of Phase III?

Possible Answers:

diffusion of oxygen and carbon dioxide in the alveoli

delivery of oxygen to the erythrocytes, and the removal of carbon dioxide from the erythrocytes and the bloodstream

movement of ambient air in and out of the respiratory tract

regulation of ventilation

Correct answer:

delivery of oxygen to the erythrocytes, and the removal of carbon dioxide from the erythrocytes and the bloodstream

Explanation:

The four phases of ventilation are as follows: Phase I is the movement of ambient air in and out of the respiratory tract; Phase II is the diffusion of oxygen and carbon dioxide in the alveoli; Phase III entails the delivery of oxygen to erythrocytes, and the removal of carbon dioxide from the erythrocytes and the bloodstream; Phase IV is the regulation of ventilation.

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