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

A.

Binding

B.

Integration

C.

Fusion

D.

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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Related Questions

Correct Answer is C

Explanation

A. Obstructive shock occurs when blood flow is physically obstructed, such as in cases of pulmonary embolism or cardiac tamponade, which is not indicated here as the cause is blood loss.
B. Septic shock is related to infection and systemic inflammatory response, not directly caused by blood loss.
C. Hypovolemic shock is caused by a significant loss of blood volume, leading to decreased blood pressure, which directly relates to the client losing 800 mL of blood during surgery. This condition results in inadequate perfusion and oxygen delivery to tissues.
D. Neurogenic shock results from spinal cord injuries leading to vasodilation and bradycardia, which is not applicable to this scenario.

Correct Answer is ["A","C"]

Explanation

A. Orthostatic hypotension is a common sign of hypovolemia, as the lack of fluid volume can lead to a drop in blood pressure when changing positions.
B. Bradycardia is not typically associated with fluid volume deficit; tachycardia is more common as the body tries to compensate for low blood volume.
C. Decreased skin turgor is a classic sign of dehydration and fluid volume deficit, indicating reduced skin elasticity.
D. Weight gain is associated with fluid volume overload, not deficit.
E. Pulmonary edema is related to fluid volume overload or congestive heart failure, not hypovolemia.

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