All functions of lymph Node except

Correct Answer: C

Rationale: Lymph nodes filter lymph , form lymphocytes , and mediate immunity ; RBC destruction and blood formation occur in the spleen.

Correct Answer: C

Rationale: Lymphatic vessels have bicuspid valves, giving a beaded appearance ; they have thin walls and variable diameters.

Correct Answer: A

Rationale: T-cell receptors are exclusive to adaptive immunity (T cells); TLRs , mannose receptors , and complement receptors are on innate immune cells like macrophages.

Correct Answer: C

Rationale: Hyperactivation is the highest macrophage activation state, beyond resting or basic activation ; MHC II upregulation is a feature, not a state.

Correct Answer: A

Rationale: NKT cells have limited TCR diversity ; gamma-delta and alpha-beta T cells have broader repertoires.