Which stage of the HIV lifecycle involves the virus attaching to the host cell membrane?

Binding

Integration

Fusion

Reverse Transcription

Answer and Explanation

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.

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Correct Answer is B

Explanation

A. Metabolic alkalosis is characterized by an increased pH and increased HCO3 levels, which does not fit the provided values.
B. The low HCO3 of 18 mEq indicates a metabolic acidosis, as the body is unable to retain enough bicarbonate to balance the acid levels, and the pH is also low at 7.30, confirming acidosis.
C. Respiratory alkalosis would show a high pH and low PaCO2, which is not the case here.
D. Respiratory acidosis would be indicated by a high PaCO2 and a low pH, but the HCO3 level is low, indicating a metabolic issue rather than a respiratory one.

A. A phlebotomist who collects blood from clients who have HIV B. A nurse who works for an insurance company and collects urine samples from clients who have HIV C. A personal trainer who works with a client who has HIV D. An occupational therapist who works with a client who has HIV

Correct Answer is A

Explanation

A. A phlebotomist collecting blood from clients who have HIV is at the greatest risk due to the potential for exposure to infected blood, especially if safety precautions are not properly followed.
B. A nurse working for an insurance company collecting urine samples is at a lower risk, as urine is not a primary mode of HIV transmission.
C. A personal trainer working with a client who has HIV may be at risk if there are open wounds, but the risk is less compared to healthcare workers directly handling blood.
D. An occupational therapist working with a client who has HIV may have some exposure risk, but it is significantly lower than that of a phlebotomist who handles blood samples.

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Which stage of the HIV lifecycle involves the virus attaching to the host cell membrane?

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Naxlex Comprehensive Predictor Exams

A nurse is caring for a client who has the following arterial blood gas results: HCO3 18 mEq, PaCO2 28 mm Hg, and pH 7.30. The nurse recognizes the client is experiencing which of the following acid-base imbalances?

Correct Answer is B

Explanation

A group of nurses are discussing risk factors for transmission of human immunodeficiency virus (HIV) from clients. Which of the following individuals should the nurse identify as being at the greatest risk for contracting HIV?

Correct Answer is A

Explanation

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