Which important white blood cells travel throughout the bloodstream seeking out bacteria?.
Neutrophils.
Macrophages.
Phagocytes.
Phagosomes.
The Correct Answer is A
Choice A rationale:
Neutrophils are the most abundant type of white blood cells and are the first to travel to the site of an infection.
Choice B rationale:
Macrophages are white blood cells that reside in tissues and are key players in the immune response, but they do not travel throughout the bloodstream seeking out bacteria.
Choice C rationale:
Phagocytes is a general term for cells that engulf and digest pathogens, which includes neutrophils and macrophages.
Choice D rationale:
Phagosomes are not cells, but are compartments within phagocytes that contain pathogens to be destroyed.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale:
HIV invades various immune cells, most notably CD4+ T cells, eventually destroying them.
Choice B rationale:
D cells are not a recognized category of immune cells, and HIV does not specifically invade them.
Choice C rationale:
While B cells are part of the immune system, HIV primarily targets CD4+ T cells, not B cells.
Choice D rationale:
Helper C cells are not a recognized category of immune cells, and HIV does not specifically invade them.
Correct Answer is B
Explanation
Choice A rationale:
While veins do convey blood back to the heart, this is not the reason they are called capacitance vessels.
Choice B rationale:
Veins are referred to as capacitance vessels because they can stretch and contain about 60% of the body’s blood volume.
Choice C rationale:
Although veins contain one-way valves, this characteristic does not define them as capacitance vessels.
Choice D rationale:
Veins can constrict, but this is not the primary reason they are known as capacitance vessels.
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