ATI RN
Chapter 20 The Lymphatic System and Immunity Sample Questions Questions
Question 1 of 5
Which lymphoid tissue is most active in early childhood?
Correct Answer: B
Rationale: The thymus is most active in childhood for T cell maturation; others (A, C, D) remain active throughout life.
Question 2 of 5
Which cells in the thymus remove self-reactive T cells?
Correct Answer: B
Rationale: Dendritic cells remove self-reactive T cells; macrophages clean up, B cells are elsewhere, neutrophils are blood.
Question 3 of 5
The lymphatic system's role in fluid balance prevents:
Correct Answer: A
Rationale: It prevents edema by removing excess fluid; hypertension is circulatory, anemia is RBCs, hypoglycemia is glucose.
Question 4 of 5
Which cells release histamine during allergic reactions?
Correct Answer: B
Rationale: Mast cells release histamine in allergies; macrophages phagocytose, T cells coordinate, neutrophils fight infection.
Question 5 of 5
Which immunoglobulin is involved in early immune responses?
Correct Answer: D
Rationale: IgM is the first antibody produced; IgA is secretions, IgD is on B cells, IgE is allergies.