Correct Answer: B

Rationale: In hyperparathyroidism, there is an overproduction of parathyroid hormone, leading to increased calcium levels in the blood (hypercalcemia). This occurs as the parathyroid hormone stimulates the release of calcium from the bones and enhances calcium absorption in the intestines and kidneys. Therefore, the correct answer is hypercalcemia (Choice B). Hypocalcemia (Choice A) is not consistent with hyperparathyroidism, as this condition is characterized by high calcium levels. Hypokalemia (Choice C) and hyperphosphatemia (Choice D) are not typically associated with hyperparathyroidism and are not primary manifestations of this condition.

Correct Answer: A

Rationale: Administering insulin intravenously is the priority action for managing diabetic ketoacidosis. Insulin helps lower blood glucose levels and halts the production of ketones, addressing the underlying cause of ketoacidosis. Giving sips of water (Choice B) may be necessary for hydration, but it does not address the immediate life-threatening issue of ketoacidosis. Monitoring urine output (Choice C) is important for assessing renal function but is not the priority over administering insulin. Applying a heating pad (Choice D) is not indicated and can potentially worsen the condition in ketoacidosis.

Correct Answer: A

Rationale: Prednisone, a corticosteroid, can increase blood glucose levels by promoting gluconeogenesis and decreasing glucose uptake by cells. This medication can lead to hyperglycemia in patients, especially those with diabetes mellitus. Atenolol (Tenormin) is a beta-blocker and is not known to significantly affect blood glucose levels. Phenelzine (Nardil) is a monoamine oxidase inhibitor used to treat depression and anxiety disorders; it does not typically impact blood glucose levels. Allopurinol (Zyloprim) is a xanthine oxidase inhibitor used to manage gout and does not interfere with blood glucose regulation.

Correct Answer: C

Rationale: In hypocalcemia, a decreased level of calcium can lead to a prolonged QT interval on the ECG due to its role in myocardial repolarization. A widened T wave (Choice A) is typically seen in hyperkalemia. A prominent U wave (Choice B) is associated with hypokalemia. A shortened ST segment (Choice D) is not a typical ECG finding in hypocalcemia.

Correct Answer: A

Rationale: Clients with Addison's disease should be educated to double their corticosteroid dosage during periods of stress. This is crucial to prevent adrenal crisis, as stress can increase the body's demand for cortisol. Skipping doses when feeling well can lead to an adrenal crisis if stress occurs suddenly. Decreasing fluid intake can exacerbate dehydration and electrolyte imbalances, which are already concerns in Addison's disease. Avoiding physical activity during stressful times is not the most appropriate advice; moderate physical activity can be beneficial, as long as the client is adequately managing their corticosteroid regimen.