Correct Answer: C

Rationale: The correct answer is C. Nurses advocate for patients by ensuring that they receive the necessary care and by protecting their rights. This involves speaking up for patients, ensuring they are treated with respect, and helping them access appropriate healthcare services. Option A, providing information for informed decision-making, is an important aspect of nursing care but not the central role of advocacy. Option B, communicating patients' needs to the healthcare team, is essential but more focused on teamwork and collaboration. Option D, helping patients navigate the healthcare system and access resources, is valuable but not the primary definition of advocacy in nursing.

Correct Answer: A

Rationale: In diabetes insipidus, there is excessive excretion of water leading to dehydration. Monitoring serum sodium levels is crucial because these clients often experience hypernatremia (elevated serum sodium levels) due to the loss of relatively more water than sodium, resulting in a sodium concentration imbalance. While monitoring serum potassium, calcium, and magnesium levels is also important in various conditions, they are not the primary focus in diabetes insipidus.

Correct Answer: A

Rationale: The correct answer is A: 'Related to bone demineralization resulting in pathologic fractures.' In chronic hyperparathyroidism, bone demineralization occurs due to the excessive release of parathyroid hormone, leading to increased calcium resorption from bones. This process weakens the bones, making the client prone to pathologic fractures. Choices B, C, and D are incorrect because they do not directly relate to the increased risk of injury associated with chronic hyperparathyroidism. Exhaustion, edema, dry skin, and tetany are not the primary risks for injury in this client population.

Correct Answer: A

Rationale: The correct answer is A: Tachycardia. In hypoglycemia, the body releases adrenaline in response to low blood glucose levels, leading to symptoms such as tachycardia (rapid heart rate). Choice B, polyuria, refers to excessive urination and is not a typical symptom of hypoglycemia. Choice C, flushed skin, is not a common symptom of hypoglycemia; instead, pale skin and sweating are more characteristic. Choice D, dry mouth, is not directly associated with hypoglycemia; rather, it can be a symptom of hyperglycemia or dehydration.

Correct Answer: B

Rationale: Postoperative hypotension is a common complication after adrenal tumor removal in a client with Cushing's syndrome. This occurs due to the sudden withdrawal of cortisol, which leads to a relative adrenal insufficiency state. Hyperglycemia (Choice A) is more common preoperatively due to excessive cortisol levels. Hypokalemia (Choice C) and Hyponatremia (Choice D) are also associated with Cushing's syndrome but are less likely to be immediate postoperative complications compared to hypotension.