Give the two main functions of this organ.

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ATI RN Test Bank

A. Immunological and haematopoeitic B. Lymph filtration and storage C. T-cell education D. Phagocytosis only

Correct Answer: A

Rationale: The spleen's main functions are immunological (lymphocyte activity) and hematopoietic (blood cell production/filtering).

Contain B. T lymphocyte

A. follicular zone B. germinal zone C. PALS D. marginal zone

Correct Answer: D

Rationale: The marginal zone in white pulp contains both B- and T-lymphocytes.

origin of T-lymphocyte

A. ectodermal B. mesodermal C. endodermal D. none of above

Correct Answer: B

Rationale: T-lymphocytes originate from mesodermal bone marrow stem cells.

Thymus dependent zone in the lymph node & spleen are & respectively:

A. Cortical follicles & red pulp B. Paracortex & red pulp C. Medullary cords & splenic sinusoids D. Paracortex & periarteriolar lymphatic sheath

Correct Answer: D

Rationale: Thymus-dependent zones are paracortex (lymph node) and PALS (spleen) .

Where does mesothelioma develop?

A. Alveoli B. Bronchi C. Pleura D. Trachea

Correct Answer: C

Rationale: Mesothelioma develops in the pleura , the lung's lining, due to asbestos exposure; not in alveoli , bronchi , or trachea .

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