ATI RN
Lymphatic System Practice Questions Questions
Question 1 of 5
Which cells are professional phagocytes?
Correct Answer: C
Rationale: Macrophages and neutrophils are professional phagocytes ; T cells , B cells , and NK cells are not.
Question 2 of 5
What is the main function of the thymus?
Correct Answer: D
Rationale: The thymus eliminates self-reactive T cells via selection ; Treg generation is secondary, not B cells or activation .
Question 3 of 5
Which area is not drained by the thoracic duct?
Correct Answer: C
Rationale: The thoracic duct drains all but the right arm/upper right quadrant , which the right lymphatic duct handles.
Question 4 of 5
The majority of vaccines work by eliciting pathogen-specific antibodies that circulate in our bodies and protect us in the event that we are later exposed to that specific pathogen. For most viruses and bacterial toxins that we are vaccinated against, these pre-existing antibodies are protective because:
Correct Answer: A
Rationale: Antibodies neutralize viruses/toxins by blocking cell entry ; liver transport , lysis , or mucus aren't primary mechanisms.
Question 5 of 5
In healthy adults, neutrophils represent approximately half of their white blood cells. During a bacterial infection, this number often rises to >80%. One factor contributing to this rise is:
Correct Answer: C
Rationale: Bone marrow releases neutrophils during infection; tissues , proliferation (B/C), or monocyte differentiation don't explain the rise.