The spleen's white pulp is involved in:

Correct Answer: B

Rationale: White pulp produces antibodies; filtering and RBC removal are red pulp, platelets are stored.

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.

Correct Answer: B

Rationale: Venous sinuses open into red pulp veins.