What is the role of MHC class II molecules?

ATI RN

ATI RN Test Bank

A. Present antigens to cytotoxic T cells B. Present antigens to T-helper cells C. Activate B cells D. Produce cytokines

Correct Answer: B

Rationale: MHC II presents to T-helper cells; MHC I is for cytotoxic, B cells use BCR, cytokines are separate.

What is the role of T-cytotoxic cells?

A. Produce antibodies B. Kill infected cells C. Activate B cells D. Phagocytose pathogens

Correct Answer: B

Rationale: T-cytotoxic cells kill infected cells; antibodies are B cells, activation is T-helper, phagocytosis is macrophages.

With regard to the superficial cortex of the lymph node: It is part of a primary lymphatic organ.

A. TRUE B. FALSE C. D.

Correct Answer: B

Rationale: Lymph nodes are secondary lymphatic organs; primary organs include thymus and bone marrow.

The lymphatic fluid is

A. Brownish B. Pinkish C. Colorless D. Bluish

Correct Answer: C

Rationale: Lymphatic fluid is typically colorless, lacking the red blood cells that give blood its color.

is irregular branched with B-lymph, contineous with Cortical follicle

A. Para Cortex B. secondary Nodule C. Primary Nodule D. medullary Cord

Correct Answer: D

Rationale: Medullary cords are irregular, branched, B-lymphocyte-rich, and continuous with cortical follicles.

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