ATI RN
Questions on the Immune System Questions
Question 1 of 5
Which cells in lymph nodes engulf and destroy pathogens?
Correct Answer: A
Rationale: Macrophages phagocytose pathogens in lymph nodes; B and T cells are lymphocytes, and neutrophils are in blood.
Question 2 of 5
What is the primary function of lymphatic valves?
Correct Answer: B
Rationale: Valves prevent lymph backflow; they don't increase pressure , filter , or produce lymph.
Question 3 of 5
The thoracic duct drains into the venous system at the junction of:
Correct Answer: A
Rationale: The thoracic duct drains at the subclavian-jugular junction ; others (B, C, D) are incorrect.
Question 4 of 5
Which lymphoid organ regresses with age?
Correct Answer: B
Rationale: The thymus regresses after puberty; spleen , nodes , and tonsils persist.
Question 5 of 5
Which cells produce antibodies?
Correct Answer: B
Rationale: B cells produce antibodies; T cells coordinate, macrophages phagocytose, neutrophils fight infection.