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ATI LPN · Medical Surgical Nursing · Immune System Questions

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

What is the role of CD40L in T cell activation?

A. It prolongs the life of the DC

B. It helps the Th cell bind to the DC

C. It stimulates proliferation of T cells

D. It activates the TCR on the T cell

Expert Explanatory Rationale

Correct Answer: It prolongs the life of the DC

Question 2 of 5

Which immune system cell is the most abundant in the lamina propria?

A. B cells

B. T cells

C. Macrophages

D. Neutrophils

Expert Explanatory Rationale

Correct Answer: T cells

Question 3 of 5

What are PRRs and what do they recognize?

A. PAMPs and MAMPs; intracellular molecules released by dying cells

B. Danger signals; pathogen-associated molecular patterns and damage-associated molecular patterns; intracellular molecules released by dying cells

C. Toll-like receptors; viral RNA and DNA

D. Warning signals; nearby cells preparing for attack

Expert Explanatory Rationale

Correct Answer: Danger signals; pathogen-associated molecular patterns and damage-associated molecular patterns; intracellular molecules released by dying cells

Question 4 of 5

NADPH from HMP in RBCs used for?

A. Fatty acid synthesis

B. Glutathione reduction

C. ATP formation

D. Oxygen radical removal

Expert Explanatory Rationale

Correct Answer: Glutathione reduction

Question 5 of 5

Lipid exchange between the RBC membrane and the plasma occurs:

A. To replace lost lipids in the membrane

B. To provide a mechanism for excretion of lipid-soluble RBC waste products

C. To ensure symmetry between the composition of the interior and exterior lipid layers

D. To provide lipid-soluble nutrients to the RBC

Expert Explanatory Rationale

Correct Answer: To replace lost lipids in the membrane

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