What is the purpose of cilia in the airways?.
To propel air into the lungs.
To trap food and prevent entry into the windpipe.
To propel trapped debris upward to be expelled by the body.
For olfaction.
The Correct Answer is C
hoice A rationale:
Cilia do not propel air into the lungs, they are involved in moving mucus and trapped particles.
Choice B rationale:
Cilia do not trap food or prevent its entry into the windpipe. This is the role of the epiglottis, not cilia.
Choice C rationale:
Cilia in the airways help to propel trapped debris and mucus upward to be expelled by the body.
Choice D rationale:
Cilia do not have a role in olfaction or the sense of smell.
Nursing Test Bank
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 A
Explanation
Choice A rationale:
Expiration, also known as exhalation, is the process of air leaving the lungs.
Choice B rationale:
Respiration is a broader term that includes both the inhalation and exhalation processes.
Choice C rationale:
Inhalation is the process of drawing air into the lungs, not exhaling.
Choice D rationale:
Inspiration is another term for inhalation, not exhalation.
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