Which lymphoid tissue protects the respiratory tra

ATI RN

ATI RN Test Bank

Which lymphoid tissue protects the respiratory tract?

A. Peyer's patches B. Tonsils C. Appendix D. Spleen

Correct Answer: B

Rationale: Tonsils guard the respiratory tract; Peyer's and appendix are gut, spleen is blood.

What is the primary function of the right lymphatic duct?

A. Drain the left body B. Drain the right upper body C. Filter lymph D. Produce lymph

Correct Answer: B

Rationale: The right lymphatic duct drains the right upper body; thoracic duct drains left , filtering is nodes.

The spleen's primary immune function is to:

A. Mature T cells B. Filter blood C. Produce lymph D. Store antibodies

Correct Answer: B

Rationale: The spleen filters blood for pathogens; T cells mature in thymus, lymph is from nodes, antibodies aren't stored.

What is the role of MHC class I molecules?

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

Correct Answer: C

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

The thymus produces which hormone?

A. Insulin B. Thymosin C. Cortisol D. Adrenaline

Correct Answer: B

Rationale: Thymosin aids T cell maturation; insulin is pancreas, cortisol and adrenaline are adrenal.

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