The nurse knows that Type 1 Hypersensitivity reactions are caused by which of the following?
Release of memory T-cells
Organ rejection
Damage to blood vessels
Release of histamine
The Correct Answer is D
A. Release of memory T-cells: Memory T-cells are involved in Type IV delayed hypersensitivity, not Type I reactions.
B. Organ rejection: Organ rejection is associated with Type IV hypersensitivity reactions, not Type I.
C. Damage to blood vessels: This is more characteristic of Type III hypersensitivity reactions.
D. Release of histamine: Type I hypersensitivity reactions, such as anaphylaxis and allergic rhinitis, are triggered by the release of histamine from mast cells after IgE-mediated sensitization.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Western blot: Used to confirm HIV diagnosis rather than monitor therapy effectiveness.
B. Enzyme-linked immunosorbent assay (ELISA): Typically used for initial detection of viral infections, especially HIV.
C. Viral load testing: Measures the amount of virus in the bloodstream to assess treatment effectiveness.
D. P24 antigen testing: Used for early detection of HIV but not for monitoring ongoing therapy.
Correct Answer is B
Explanation
A. A CD4 count 300/μL: Although this may indicate immunosuppression, it is not consistent with AIDS, which requires a CD4 count below 200/μL.
B. A CD4 count 100/μL: This count is indicative of advanced AIDS, where patients are highly susceptible to opportunistic infections.
C. A CD4 count of 800/μL: This is within the normal range for a healthy individual.
D. A CD4 count of 600/μL: This is still within the normal range and does not indicate AIDS.
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