Which is a function of the respiratory system?

Oxygen diffuses across the alveolar membrane into the blood.

The alveoli have cilia that help remove foreign particles.

The diaphragm controls respiration.

The bronchioles contain macrophages that phagocytize inhaled bacteria.

Answer and Explanation

The Correct Answer is A

A. Oxygen diffuses across the alveolar membrane into the blood: This is the primary function of the respiratory system, ensuring oxygenation of blood.
B. The alveoli have cilia that help remove foreign particles: Cilia are present in the respiratory tract, but not in the alveoli.
C. The diaphragm controls respiration: The diaphragm assists with breathing but does not "control" respiration, which is regulated by the brainstem.
D. The bronchioles contain macrophages that phagocytize inhaled bacteria: Macrophages are found in alveoli, not the bronchioles.

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Correct Answer is C

Explanation

A) "Repeat your breathing exercise every 2 hrs." Repeating breathing exercises should be done a couple of times every hour to help prevent postoperative complications such as atelectasis and pneumonia.
B) "Inhale through your mouth." Clients should inhale through their nose to filter, warm, and humidify the air.
C) "Hold your breath for 5 seconds." Holding the breath for 5 seconds allows for better lung expansion and optimal oxygen exchange.
D) "Exhale through your nose." Clients are generally advised to exhale through pursed lips to create positive airway pressure and prevent airway collapse.

A. A nasal cannula B. A Venturi mask C. A humidifier D. High oxygen flow rate

Correct Answer is C

Explanation

A. A nasal cannula: May cause further nasal irritation and is not ideal for patients with sinus disorders.
B. A Venturi mask: Provides precise oxygen delivery but does not address sinus-related discomfort.
C. A humidifier: Helps add moisture to the oxygen, reducing nasal and sinus irritation and improving comfort.
D. High oxygen flow rate: High flow rates without humidification exacerbate sinus irritation.

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Which is a function of the respiratory system?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is reinforcing preoperative teaching for a client about coughing and deep breathing. Which of the following statements should the nurse make?

Correct Answer is C

Explanation

A patient who will begin oxygen therapy has a history of sinus disorders. This patient would benefit most from which oxygen setup?

Correct Answer is C

Explanation

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