What is the term for self-tolerance failure?

Correct Answer: B

Rationale: Autoimmunity is self-tolerance failure; allergy and hypersensitivity are overreactions, immunodeficiency is weakness.

Correct Answer: B

Rationale: Memory B cells enable rapid secondary responses; killing is T cells, phagocytosis is macrophages, presentation is dendritic.

Correct Answer: A

Rationale: White pulp is encapsulated within the spleen by a reticular framework, though the spleen itself has a capsule.

Correct Answer: D

Rationale: The spleen filters blood, breaks down red blood cells, and stores blood, but in adults, red blood cell formation primarily occurs in bone marrow, not the spleen.

Correct Answer: D

Rationale: Paracortex is the thymus-dependent zone in lymph nodes, rich in T-lymphocytes.