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HESI LPN · HESI LPN Medical Surgical Nursing · HESI ATI the Immune System Test Quizlet

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

What was atypical about the 2009 H1N1 pandemic?

A. It emerged entirely as an assortment of human strains, while typical pandemics are caused by newly generated animal strains

B. It was a newly assorted virus unrelated to the human strains that were circulating worldwide in 2009

C. It was a variant of 1918 H1N1 that is still circulating in pigs

D. It did not affect the very young, an age group typically struck by flu viruses

Correct Answer: It was a newly assorted virus unrelated to the human strains that were circulating worldwide in 2009

Question 2 of 5

A main cytokine produced by CD4+ TH1 cells is

A. IL-4

B. IL-10

C. IL-5

D. IFN-ÃƒÅ½Ã‚Â³

Correct Answer: IFN-ÃƒÅ½Ã‚Â³

Question 3 of 5

What is the primary cause of anaphylaxis?

A. Immune complex deposition

B. Systemic release of vasoactive mediators

C. Localized mast cell degranulation

D. T cell activation

Correct Answer: Systemic release of vasoactive mediators

Question 4 of 5

A protective response to Leishmania parasites is most likely to occur when:

A. Activated Th cells differentiate into Th1 effectors that secrete IL-4 required to induce secretion of appropriate antibody isotypes

B. Activated Th cells differentiate into Th2 effectors that secrete IL-4 required to activate macrophages

C. Activated Th cells differentiate into Th1 effectors that secrete IFNÃƒÅ½Ã‚Â³ required to activate macrophages

D. Either a Th1- or a Th2-mediated response occurs

Correct Answer: Activated Th cells differentiate into Th1 effectors that secrete IFNÃƒÅ½Ã‚Â³ required to activate macrophages

Question 5 of 5

Which of the following should a client with autoimmune disorder be advised to avoid?

A. Rest during the periods of severe exacerbation

B. Regular exercise during the periods of remission

C. Being in crowds during the periods of immunosuppression

D. Humid environment during the periods of remission

Correct Answer: Being in crowds during the periods of immunosuppression

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