What is the role of dendritic cells in lymph nodes?

Correct Answer: B

Rationale: Dendritic cells present antigens; antibodies are B cells, killing is T cells, phagocytosis is macrophages.

Correct Answer: B

Rationale: White pulp filters blood, not lymph; lymph filtration occurs in lymph nodes.

Correct Answer: A

Rationale: The pancreas is a digestive and endocrine organ, not a lymphatic organ; spleen, thymus, and tonsils are part of the lymphatic system.

Correct Answer: C

Rationale: Primary nodules contain inactive B-lymphocytes; secondary nodules have active ones.

Correct Answer: C

Rationale: Spleen filters blood , forms blood in fetal life , destroys RBCs and has immune functions ; lymphocyte formation in germinal centers is more lymph node-specific (C is less accurate).