Correct Answer: C

Rationale: The correct answer is C. Monitoring blood glucose levels before meals and at bedtime is crucial for managing type 2 diabetes mellitus. Option A is incorrect because limiting protein intake is not a primary focus for diabetes management. Option B is unrelated to diabetes management and focuses on pain relief. Option D mentions reducing carbohydrate intake, which is a common dietary recommendation for managing blood sugar levels, but it is not as specific as monitoring blood glucose levels at key times.

Correct Answer: B

Rationale: The correct answer is B: Dyspnea. Dyspnea, or difficulty breathing, is a common sign of fluid overload in a client receiving packed RBCs. When fluid accumulates in the lungs due to overload, it can lead to respiratory distress. This finding requires prompt intervention to prevent further complications. Choices A, C, and D are incorrect: A) Low back pain is not typically associated with fluid overload; C) Hypotension refers to low blood pressure and is not a typical finding in fluid overload; D) Thready pulse may indicate poor perfusion but is not a direct indicator of fluid overload.

Correct Answer: A

Rationale: The correct answer is A: Serum glucose level. In Cushing's disease, there is increased cortisol production, leading to elevated blood glucose levels. This occurs due to the role of cortisol in promoting gluconeogenesis and insulin resistance. Choices B, C, and D are incorrect because Cushing's disease is not typically associated with alterations in serum potassium, calcium, or sodium levels.

Correct Answer: A

Rationale: The correct answer is A: Increased creatinine. In chronic kidney disease, the kidneys are unable to filter waste effectively, leading to a buildup of creatinine in the blood. This results in increased creatinine levels in laboratory tests. Choice B, increased hemoglobin, is not typically associated with chronic kidney disease. Choice C, increased bicarbonate, is also not a common finding in chronic kidney disease; in fact, metabolic acidosis with decreased bicarbonate levels is more common. Choice D, increased calcium, is not expected in chronic kidney disease; instead, calcium levels may be low due to impaired kidney function.

Correct Answer: C

Rationale: Jugular vein distention is a classic sign of left-sided heart failure due to fluid overload in the pulmonary circulation. This occurs because the heart's left side is unable to pump effectively, causing increased pressure in the pulmonary veins and leading to blood backing up into the pulmonary circulation. Peripheral edema (choice A) and dependent edema (choice D) are more commonly associated with right-sided heart failure where blood pools in the systemic circulation, causing swelling in the extremities. Bradycardia (choice B) is not typically a direct consequence of left-sided heart failure; instead, tachycardia is more commonly seen as the heart compensates for its reduced efficiency.