1. A patient with a history of type 1 diabetes mellitus is admitted to the ICU for diabetic ketoacidosis (DKA). Which of the following is the initial insulin therapy of choice? A. Insulin glargine B. NPH insulin C. Regular insulin infusion D. Insulin aspart Answer: C. Regular insulin infusion Rationale: Regular insulin infusion is preferred for the initial management of DKA because it can be closely titrated and has a rapid onset of action. 2. A 42-year-old patient presents with fatigue, weight gain, and constipation. Laboratory tests reveal low serum T3 and T4 levels. Which of the following is the most likely diagnosis? A. Hyperthyroidism B. Hypothyroidism C. Thyroid storm D. Graves' disease Answer: B. Hypothyroidism Rationale: The symptoms and low thyroid hormone levels are indicative of hypothyroidism, a common endocrine disorder. 3. A nurse is caring for a patient with Addison's disease. Which of the following interventions is critical when this patient experiences stress? A. Decrease corticosteroid dose B. Increase corticosteroid dose C. Administer rapid-acting insulin D. Provide high-carbohydrate meals Answer: B. Increase corticosteroid dose Rationale: Patients with Addison's disease require increased doses of corticosteroids during periods of stress to mimic the body's normal response and prevent Addisonian crisis. 4. During the assessment of a patient with pheochromocytoma, which of the following symptoms would the nurse expect to find? A. Hypotension