The spleen's red pulp contains which blood component?

Correct Answer: B

Rationale: Red pulp contains red blood cells ; plasma is fluid, lymphocytes are in white pulp, neutrophils are less.

Correct Answer: C

Rationale: Bone marrow produces immune cells; spleen filters, thymus matures T cells, nodes activate.

Correct Answer: A

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

Correct Answer: B

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

Correct Answer: B

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