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 A
Explanation
Answer and explanation
The correct answer is Choice A.
Choice A rationale:
The conchae or turbinates are structures in the nasal cavity that increase the surface area of the mucosa exposed to the air. As air passes over the mucosa, it picks up moisture and heat, which helps to humidify and warm the air before it reaches the lungs.
Choice B rationale:
The sphenoid is a bone located at the base of the skull. It does not have a direct role in the heating or humidification of air.
Choice C rationale:
The nasopharynx is part of the pharynx that connects the nasal cavity to the throat. While it does play a role in the passage of air from the nose to the lungs, it is not the primary site where air picks up moisture and heat.
Choice D rationale:
The oropharynx is another part of the pharynx, located below the nasopharynx. It is involved in both respiratory and digestive processes, but it is not the main site where air picks up moisture and heat.
So, the correct answer is Choice A, after analyzing all choices.
Correct Answer is D
Explanation
Choice A rationale:
Thoracotomy is a surgical procedure to gain access to the thoracic organs, not specifically for removing air from the pleural space.
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:
A chest tube is inserted to remove air from the pleural space and re-establish negative pressure so the lung can re-expand3.
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