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: B

Rationale: The correct answer is B. Nursing ethics primarily focus on the moral character of nurses, emphasizing principles, values, and virtues that guide their professional conduct. Choice A is incorrect as nursing ethics are more about individual moral decision-making than organizational practices. Choice C is incorrect because while nurses consider patients' experiences and needs, nursing ethics primarily revolve around the nurses themselves. Choice D is incorrect as nursing ethics are centered on the moral obligations and responsibilities of nurses, not specifically on the ethical principles governing healthcare organizations.

Correct Answer: A

Rationale: The correct answer is A, lactic acidosis. Metformin, a common medication for type 2 diabetes mellitus, can lead to lactic acidosis, particularly in individuals with renal impairment or predisposing factors. Monitoring for signs of lactic acidosis, such as muscle pain, weakness, trouble breathing, dizziness, and slow or uneven heart rate, is crucial to prevent serious complications. Choices B, C, and D are incorrect as metformin does not typically cause hypokalemia, hyperglycemia, or weight gain as its primary side effects.

Correct Answer: B

Rationale: Theory Y, as proposed by Douglas McGregor, emphasizes that employees are intrinsically motivated and seek responsibility. It suggests that high morale leads to high productivity, aligning with the nurse manager's actions. Theory X, on the other hand, assumes employees are inherently lazy and need to be closely monitored and controlled. Servant leadership focuses on serving others first and prioritizing their needs, which is not directly related to the scenario described. Scientific management, developed by Frederick Taylor, emphasizes efficiency and standardization through systematic study and organizational control, which is not the primary focus of the nurse manager's approach to boosting employee morale.

Correct Answer: C

Rationale: In Cushing's syndrome, the characteristic features include central obesity with deposits of adipose tissue in the trunk and dorsocervical area, often referred to as a 'buffalo hump.' Hypotension (Choice A) is not typically associated with Cushing's syndrome; instead, hypertension is more common. Thick, coarse skin (Choice B) is seen in conditions like hypothyroidism, not specifically in Cushing's syndrome. Weight gain in the arms and legs (Choice D) is not a typical finding in Cushing's syndrome; rather, weight gain is more prominent in the central areas of the body.