ATI RN
Immune System NCLEX Questions Questions
Question 1 of 5
An example of secondary mediators released by Mast cells would be
Correct Answer: B
Rationale: PAF is a secondary mediator; histamine , heparin , and chymase are primary.
Question 2 of 5
In activated T cells, CD152 (CTLA4) is expressed on the cell surface and inhibits the binding of CD28 on these same T cells to:
Correct Answer: D
Rationale: CTLA4 blocks CD28-B7 (CD80/86); not IL-2 , CD4 , CD8 , or CD95 .
Question 3 of 5
The lymphatic system helps maintain fluid balance by:
Correct Answer: B
Rationale: It removes excess interstitial fluid ; blood production is bone marrow, oxygen is blood, and digestion is gastrointestinal.
Question 4 of 5
The lymphatic system transports dietary fats absorbed from:
Correct Answer: B
Rationale: The small intestine absorbs fats into lymph; stomach and large intestine don't, liver processes.
Question 5 of 5
The thoracic duct drains lymph from all EXCEPT:
Correct Answer: C
Rationale: The thoracic duct drains all but the right arm , which goes to the right lymphatic duct.