Which structure is NOT part of the lymphatic drain

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Which structure is NOT part of the lymphatic drainage system?

A. Lymph nodes B. Thoracic duct C. Spleen D. Cisterna chyli

Correct Answer: C

Rationale: The spleen filters blood, not lymph; nodes , thoracic duct , and cisterna chyli handle lymph.

What is the primary function of lymph node sinuses?

A. Produce lymph B. Filter lymph C. Store lymphocytes D. Remove RBCs

Correct Answer: B

Rationale: Sinuses filter lymph; production is capillaries, storage is cortex, RBCs are spleen.

The spleen's white pulp contains:

A. Red blood cells B. Lymphocytes C. Platelets D. Neutrophils

Correct Answer: B

Rationale: White pulp has lymphocytes; red pulp has RBCs , platelets , and some neutrophils .

What is the term for self-tolerance failure?

A. Allergy B. Autoimmunity C. Hypersensitivity D. Immunodeficiency

Correct Answer: B

Rationale: Autoimmunity is self-tolerance failure; allergy and hypersensitivity are overreactions, immunodeficiency is weakness.

The spleen's white pulp is involved in:

A. Filtering blood B. Producing antibodies C. Removing RBCs D. Storing platelets

Correct Answer: B

Rationale: White pulp produces antibodies; filtering and RBC removal are red pulp, platelets are stored.

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