What is one of the purposes of the fluid in the pleural cavity?.
Lubricate the pleural surfaces to allow them to glide painlessly during lung expansion and contraction.
Warm and moisten lung tissue.
Prevent bacteria from entering lung tissue.
Assist in the diffusion of oxygen across the respiratory membrane.
The Correct Answer is A
The correct answer is Choice A.
Choice A rationale:
The pleural fluid functions by lubricating the space between the pleura, allowing the pleura to glide smoothly during inhalation and exhalation. This cushions delicate lung tissues against friction from the ribs and the chest wall itself.
Choice B rationale:
The fluid in the pleural cavity does not warm and moisten lung tissue. This is not one of its primary functions.
Choice C rationale:
The fluid in the pleural cavity does not prevent bacteria from entering lung tissue. This is not one of its primary functions.
Choice D rationale:
The fluid in the pleural cavity does not assist in the diffusion of oxygen across the respiratory membrane. This is not one of its primary functions.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:Thoracotomy (A)is a surgical incision into the chest cavity, typically for major procedures, not specific to draining air.
Choice B rationale: A lung biopsy involves removing lung tissue for examination, not removing air from the pleural space.
Choice C rationale: Lung re-expansion is the goal of the procedure, not the procedure itself.
Choice D rationale:Chest tube insertion(thoracostomy) is the procedure toremove air, blood, or fluidfrom the pleural space and restore negative pressure, allowing the lung to re-expand. This aligns with the description in the question.
Correct Answer is B
Explanation
Choice A rationale:
Vasodilation increases the diameter of blood vessels, which decreases resistance and thus decreases pressure. However, the increased diameter allows for increased blood flow, not decreased.
Choice B rationale:
Vasodilation decreases pressure due to the increased diameter of the blood vessels, and it increases flow because of the reduced resistance to blood flow.
Choice C rationale:
Vasodilation does not increase pressure; it decreases it.
Choice D rationale:
While vasodilation decreases pressure, it does not decrease flow; it increases it.
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