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.
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Correct Answer is D
Explanation
A. Muscle weakness and confusion are more commonly associated with metabolic or mixed acid-base disturbances rather than respiratory alkalosis specifically.
B. Decreased deep tendon reflexes and hypotension are not typical signs of respiratory alkalosis, which usually involves changes in breathing patterns.
C. Bradycardia and decreased respiratory rate are more likely associated with respiratory acidosis or other conditions, not with respiratory alkalosis.
D. Rapid, shallow breathing, often due to anxiety or panic attacks, is characteristic of respiratory alkalosis. Patients may also report feelings of panic due to the hyperventilation that leads to this condition.
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.