Which statement most correctly describes the main function of the lymph nodes?.
The production of lymphatic fluid.
The filtration of blood plasma to remove excess white blood cells.
The production of antibodies.
The removal of pathogens and foreign material from lymphatic fluid.
The Correct Answer is D
Choice A rationale:
Lymph nodes do not produce lymphatic fluid, they filter it.
Choice B rationale:
Lymph nodes do not filter blood plasma to remove excess white blood cells. They filter lymphatic fluid to remove foreign invaders.
Choice C rationale:
While lymph nodes do contain cells that can produce antibodies, this is not their main function.
Choice D rationale:
The main function of lymph nodes is to filter lymphatic fluid and remove pathogens and foreign material.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
hoice A rationale:
Inspired gas passes through the convoluted air passages of the nasopharynx and pharynx which generates turbulence. This turbulence increases evaporative heat exchange between the air and the mucosa. The nasal mucosa is the lining of the nasal cavity. It moistens air that is coming into the body during inhalation.
Choice B rationale:
The sphenoid is a bone located within the skull and does not directly contribute to the heating and humidification of air.
Choice C rationale:
The nasopharynx is part of the pharynx, located above the soft palate. It serves as an air passage way connecting the nasal cavity to the throat and does not directly heat or humidify the air.
Choice D rationale:
The oropharynx is also part of the pharynx, located between the soft palate and the epiglottis. It serves as a passageway for both air and food but does not directly heat or humidify the air.
Correct Answer is A
Explanation
Choice B rationale:
The bronchioles are part of the airway that leads to the alveoli, but gas exchange does not occur here.
Choice C rationale:
The bronchus is a larger airway that leads to the bronchioles and then to the alveoli, but gas exchange does not occur here.
Choice D rationale:
While the lungs contain the alveoli where gas exchange occurs, saying that gas exchange occurs in the lungs is not as precise as saying it occurs in the alveoli.
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