Correct Answer: B

Rationale: The correct answer is B. The nurse should explain that zidovudine (AZT) works by blocking reverse transcriptase, the enzyme necessary for HIV replication. This is the key mechanism of action for AZT in managing HIV. Choice A is incorrect because it provides a partial truth - it does slow the disease process but does not provide the mechanism of action. Choice C is incorrect as it provides incorrect information that there are no medications to stop or cure HIV, which is not true. Choice D is incorrect as it provides misleading information about the drug becoming immune to HIV, which is not the primary concern in this context.

Correct Answer: C

Rationale: The correct answer is C: Axon. The axon is the part of the neuron that transmits impulses away from the cell body towards other neurons, muscles, or glands. Its structure allows for the rapid transmission of electrical signals. Rationale: 1. Dendrites receive signals and transmit them towards the cell body, so A is incorrect. 2. Neurolemma is the outermost layer of a Schwann cell, not a part of the neuron responsible for transmitting impulses, so B is incorrect. 3. The synapse is the junction between two neurons where communication occurs, not a part of the neuron transmitting impulses, so D is incorrect.

Correct Answer: C

Rationale: The correct answer is C: Collaborative problem. The nurse needs to revise the collaborative problem part of the diagnostic statement because impaired physical mobility related to tibial fracture is a nursing diagnosis, not a collaborative problem. A collaborative problem involves potential complications that require both nursing and medical interventions. In this case, impaired physical mobility is a nursing diagnosis that requires nursing interventions to address the patient's inability to ambulate. Choices A, B, and D are incorrect because they are all relevant components of a nursing diagnostic statement: A - Etiology identifies the cause of the nursing diagnosis, B - Nursing diagnosis states the health problem, and D - Defining characteristic provides evidence supporting the nursing diagnosis.

Correct Answer: C

Rationale: The correct answer is C because the patient expressing fear of going home and being alone indicates apprehension about discharge. This inference is supported by the subjective data provided. Choice A is incorrect because fear of being alone does not necessarily mean the patient can perform dressing changes independently. Choice B is incorrect as resuming all previous medications is not related to the patient's fear of going home. Choice D is incorrect as the subjective data does not provide any information about the success of the surgery.

Correct Answer: C

Rationale: The correct answer is C: Collaborative problem. In the given diagnostic statement, "Impaired physical mobility related to tibial fracture as evidenced by patient’s inability to ambulate," the nurse needs to revise the mention of collaborative problem. The collaborative problem is a health issue that requires the expertise of multiple healthcare providers, whereas the statement provided focuses on a nursing diagnosis related to physical mobility impairment. The etiology (cause), nursing diagnosis, and defining characteristic are all relevant to the nursing diagnostic statement and do not need revision. The collaborative problem aspect is not appropriate in this context as it does not fit the criteria for a collaborative problem.