Which stage of the HIV lifecycle involves the virus attaching to the host cell membrane?
Binding
Integration
Fusion
Reverse Transcription
The Correct Answer is A
A. Binding is the initial step where the HIV virus attaches to the CD4 receptor on the host cell's surface. This interaction is crucial for the subsequent entry of the virus into the host cell.
B. Integration occurs later in the lifecycle, after the virus has entered the host cell and its RNA is converted to DNA.
C. Fusion refers to the process where the viral envelope fuses with the host cell membrane to allow entry into the cell, which follows the binding stage.
D. Reverse Transcription is the process of converting viral RNA into DNA after the virus has entered the host cell, and is not involved in the attachment phase.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Fluid overload is not an allergic reaction but rather a complication of transfusion related to the volume of fluid administered, thus diphenhydramine would not be appropriate.
B. Urticaria, or hives, is a common mild allergic reaction that can occur during blood transfusions. Administering diphenhydramine can help prevent or treat this response.
C. Hemolysis is a serious reaction involving the destruction of red blood cells, often due to blood type incompatibility; it is not alleviated by antihistamines.
D. Fever can occur during transfusions but is typically due to non-specific immune reactions and does not respond to diphenhydramine.
Correct Answer is A
Explanation
A. The CD4-T-cell count of 180 cells/mm3 is a critical measure of immune function in an HIV-positive client, indicating progression of the disease and risk for opportunistic infections. Values below 200 cells/mm3 signify the client has progressed to AIDS.
B. A positive Western blot test confirms the presence of HIV but does not indicate the immediate health risk or necessary interventions.
C. A platelet count of 150,000/mm3 is within the normal range, thus not indicative of any urgent concerns.
D. A WBC count of 5,000/mm3 is also within normal limits and does not highlight an immediate issue that needs addressing compared to the CD4 count.
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