Correct Answer: C

Rationale: The most crucial nursing assessment in determining whether therapy should be initiated for an asymptomatic HIV-infected client with a CD4 cell count of 500 is the client's willingness to comply with complex drug schedules. Adherence to antiretroviral therapy is essential for its effectiveness. Assessing the client's willingness and ability to comply with the complex medication regimen is crucial to ensure successful treatment and prevent drug resistance. Choices A, B, and D, although important in the overall care of the client, are not as crucial as assessing the client's willingness to adhere to the prescribed drug regimen.

Correct Answer: B

Rationale: Monitoring daily weight and blood pressure is crucial to assess the effectiveness of diuretics (furosemide) and antihypertensives (atenolol, enalapril) in managing heart failure and hypertension. Changes in weight indicate fluid status, while blood pressure readings reflect the control of hypertension. Assessing bowel sounds and range of motion are important but not directly related to evaluating the effectiveness of these specific medications in this scenario. Monitoring for hypokalemia is important due to furosemide's potential side effect, but it is not the primary assessment to evaluate medication effectiveness.

Correct Answer: A

Rationale: The correct answer is A: Frequent exercise and weight control. These should be emphasized as a goal for all diabetics because they help prevent complications and manage blood sugar levels. Regular physical activity and maintaining a healthy weight are crucial in managing diabetes as they can improve insulin sensitivity, regulate blood sugar levels, and reduce the risk of cardiovascular complications. Choice B, preventing eye damage, is important but is more specific to diabetic retinopathy and not a general goal for all diabetics. Choice C, keeping insulin refrigerated, is essential for insulin storage but not a primary goal for all diabetics. Choice D, preventing the development of complications, is too broad and does not provide a specific actionable goal for all diabetics.

Correct Answer: D

Rationale: A serum calcium level of 7.5 mg/dL is indicative of hypocalcemia, a common complication in clients with chronic kidney disease due to impaired calcium absorption and metabolism. Hypercalcemia (Choice A) is the opposite of the condition presented in the question and is characterized by elevated serum calcium levels. Hyperkalemia (Choice B) is an increased potassium level, not related to the client's serum calcium level. Hyponatremia (Choice C) is a decreased sodium level and is also not related to the client's serum calcium level.

Correct Answer: B

Rationale: Shortness of breath in a client with emphysema may indicate respiratory distress. Assessing the client's respiratory rate and effort is the first priority to determine the severity of the distress and guide appropriate interventions. Administering oxygen therapy (Choice A) could be necessary, but assessing the client first is crucial to tailor the intervention. Intubation (Choice C) is an invasive procedure that is not the initial priority. Increasing oxygen flow rate (Choice D) should only be done after a thorough assessment to avoid potential harm.