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.
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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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A) Hypercapnia. Hypercapnia refers to an excessive amount of carbon dioxide in the bloodstream, typically due to hypoventilation.
B) Hypoxemia. Hypoxemia is a condition characterized by low oxygen levels in the blood, specifically the arterial blood.
C) Dyspnea. Dyspnea refers to a subjective sensation of difficulty or uncomfortable breathing.
D) Hypoxia. Hypoxia refers to a deficiency of oxygen in the tissues, not specifically in the blood.
Correct Answer is C
Explanation
A) Choose a wool blanket when using oxygen. Wool and synthetic fabrics can generate static electricity, which is a fire hazard in the presence of oxygen.
B) Keep oxygen tanks 4 feet away from an electric stove. Oxygen tanks should be kept at least 8 to 10 feet away from heat sources, including electric stoves.
C) Store oxygen tanks upright. Oxygen tanks should always be stored upright and secured to prevent them from falling and causing injury or damage.
D) Use petroleum-based ointments to moisturize lips. Petroleum-based products are flammable and should be avoided when using oxygen. Water-based moisturizers are safer.
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