Which lymphoid tissue traps pathogens entering the

ATI RN

ATI RN Test Bank

Which lymphoid tissue traps pathogens entering the nasal cavity?

A. Palatine tonsils B. Pharyngeal tonsils C. Lingual tonsils D. Peyer's patches

Correct Answer: B

Rationale: Pharyngeal tonsils trap nasal pathogens; palatine and lingual are throat/tongue, Peyer's are intestinal.

Which organ stores lymphocytes for immune responses?

A. Thymus B. Spleen C. Appendix D. Tonsils

Correct Answer: B

Rationale: The spleen stores lymphocytes; thymus matures T cells, appendix and tonsils are smaller.

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.

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