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ATI LPN · Anatomy and Physiology · Immune System Multiple Choice Questions

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

A characteristic of pathogen produced superantigens is that they:

A. Cause specific activation of T cells

B. Prevent T cell activation by binding directly to the antigen binding site of MHC complexes

C. Block the secretion of cytokines

D. Induce excessive uncontrolled immunity as a defence mechanism to avoid antigen specific immune responses

Correct Answer: Induce excessive uncontrolled immunity as a defence mechanism to avoid antigen specific immune responses

Question 2 of 5

Which lymphoid tissue protects the respiratory tract?

A. Peyer's patches

B. Tonsils

C. Appendix

D. Spleen

Correct Answer: Tonsils

Question 3 of 5

A tissue graft between two people who are not genetically identical is termed a:

A. Isograft

B. Heterograft

C. Xenograft

D. Allograft

Correct Answer: Allograft

Question 4 of 5

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: Present antigens to cytotoxic T cells

Question 5 of 5

Tropism is a phenomenon by which

A. plants response to stimulation

B. reducing lateral branching

C. Affected by the length of the day and night

D. All above

Correct Answer: plants response to stimulation

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