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 C
Explanation
A. Dysphagia: Difficulty swallowing is not directly associated with hypoxia.
B. Nausea: Nausea is not a typical manifestation of hypoxia.
C. Agitation: Hypoxia causes restlessness and agitation as early signs due to decreased oxygen delivery to the brain.
D. Warm, dry skin: Hypoxia typically leads to cool, clammy skin rather than warmth.
Correct Answer is C
Explanation
A. Assist the guest to the floor and begin mouth-to-mouth resuscitation: The airway is still obstructed, and rescue breathing is not effective until the obstruction is cleared.
B. Slap the guest on the back several times: Back slaps are not recommended for adults with complete airway obstruction as they may worsen the blockage.
C. Perform the Heimlich maneuver on the guest: Grasping the throat and inability to talk indicate a complete airway obstruction, requiring immediate abdominal thrusts (Heimlich maneuver) to clear the airway.
D. Observe the guest before taking further action: Delaying intervention in the presence of complete obstruction can lead to respiratory arrest. Immediate action is required.
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