ATI RN
Immune System Multiple Choice Questions Questions
Question 1 of 5
What characterizes Goblet cells most?
Correct Answer: C
Rationale: Goblet cells primarily produce mucus in the respiratory tract; they lack cilia , P450 enzymes , or surfactant (D, alveolar cells).
Question 2 of 5
What cytokines do Th17 cells produce that recruit neutrophils to the site of infection and influence B cells to produce the right antibodies?
Correct Answer: A
Rationale: Th17 cells produce IL-17 and IL-21 to recruit neutrophils and aid B cells ; other pairs (B, C, D) target different responses.
Question 3 of 5
The walls of lymphatic vessels are similar to those of cardiovascular
Correct Answer: B
Rationale: Lymphatic vessel walls resemble veins with thin walls and valves; arteries are thicker, capillaries lack valves, and distributing arteries are muscular.
Question 4 of 5
In patients with lymphomas, the cancer cells invade the bone marrow and destroy the environment required for normal hematopoiesis. This leads to bone marrow failure, which disrupts the production of hematopoietic cell lineages. All of the following cell types would be affected by this EXCEPT:
Correct Answer: D
Rationale: Bone marrow failure affects hematopoietic cells (A, B, C, E) derived from stem cells; endothelial cells are non-hematopoietic and unaffected.
Question 5 of 5
The classical complement pathway is initiated by C1q binding to the surface of a pathogen. In some cases, C1q can directly bind the pathogen, for instance by recognizing proteins of bacterial cell walls, but in most cases C1q binds to IgM antibodies that are bound to the pathogen surface. How does this IgM-binding feature of C1q contribute to rapid, innate immune responses rather than to slow, adaptive responses?
Correct Answer: B
Rationale: Pre-existing natural IgM enables rapid C1q activation; B-cell secretion is adaptive, CRP or inflammation are secondary.