The tonsils are part of which immune defense?

Correct Answer: A

Rationale: Tonsils are innate barriers; adaptive involves lymphocytes, humoral is antibodies, cellular is T cells.

Correct Answer: B

Rationale: The lectin pathway uses mannose-binding lectin; antibodies are classical, cytokines signal, histamines inflame.

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.