What is the role of lymphatic trunks?

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A. Collect interstitial fluid B. Drain lymph into ducts C. Filter lymph D. Produce antibodies

Correct Answer: B

Rationale: Trunks drain lymph into ducts; capillaries collect fluid , nodes filter , and antibodies are from B cells.

The lymphatic system's role in fat absorption occurs in:

A. The lacteals B. The spleen C. The lymph nodes D. The thymus

Correct Answer: A

Rationale: Lacteals in the small intestine absorb fats; spleen , nodes , and thymus don't.

What is the term for lymph node inflammation?

A. Lymphadenitis B. Lymphangitis C. Lymphoma D. Lymphedema

Correct Answer: A

Rationale: Lymphadenitis is node inflammation; lymphangitis is vessels, lymphoma is cancer, lymphedema is swelling.

Which lymphoid organ is most involved in immune memory?

A. Thymus B. Spleen C. Lymph nodes D. Tonsils

Correct Answer: C

Rationale: Lymph nodes store memory cells; thymus matures, spleen filters, tonsils trap.

Which immunoglobulin is a pentamer?

A. IgA B. IgD C. IgE D. IgM

Correct Answer: D

Rationale: IgM is a pentamer; IgA is a dimer in secretions, IgD and IgE are monomers.

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