Correct Answer: A

Rationale: The correct answer is A: 11mEq/L. In renal failure, the kidneys are unable to excrete excess magnesium, leading to hypermagnesemia. The patient's symptoms of stomach distress and ingesting antacids suggest magnesium intake. A Mg level of 11mEq/L aligns with symptoms like flushed face and weakness. Choices B, C, and D are too low for hypermagnesemia symptoms and would not explain the patient's presentation.

Correct Answer: B

Rationale: Step-by-step rationale: 1. CD4+ cells are a type of white blood cell crucial for immune function. 2. HIV targets and destroys CD4+ cells, leading to immune system damage. 3. Measuring CD4+ levels helps determine the extent of this damage. 4. Therefore, the correct answer is B. Summary: A: Presence of opportunistic infections - CD4+ levels indirectly affect susceptibility, but not measured for this purpose. C: Level of the viral load - Measured separately from CD4+ levels. D: Resistance to antigens - CD4+ levels do not directly indicate resistance.

Correct Answer: A

Rationale: The correct answer is A: A complete thyroidectomy also. In the case of a cold nodule, which indicates potential malignancy, a total thyroidectomy is warranted to remove the entire thyroid gland to prevent the spread of cancer. A partial thyroidectomy, as in choices B and C, would not be sufficient in addressing malignancy. Administering thyroid medication, as in choice D, would not be appropriate for treating malignancy. Therefore, the correct approach is to perform a total thyroidectomy to ensure complete removal of the affected gland and to address both hyperthyroidism and potential malignancy.

Correct Answer: B

Rationale: The correct answer is B: Do not stop medication abruptly. Abruptly stopping propranolol can lead to rebound hypertension and potentially life-threatening complications. The nurse should emphasize the importance of gradual tapering under medical supervision to avoid adverse effects. A: Having potassium levels checked is not directly related to propranolol use for hypertension management. C: Changes in appetite are not specific to propranolol use and may not be a significant concern compared to abrupt cessation of the medication. D: Resuming usual daily activities is important but not as crucial as the correct instruction to avoid abrupt discontinuation of propranolol.

Correct Answer: A

Rationale: The correct answer is A: Miosis, partial eyelid ptosis, and anhidrosis on the affected side of the face. This is indicative of Horner's syndrome, which occurs due to the disruption of sympathetic nerve supply. Miosis (constricted pupil), ptosis (drooping eyelid), and anhidrosis (lack of sweating) are classic signs of Horner's syndrome. These symptoms occur when the tumor invades the ribs and affects the sympathetic nerve ganglia. Summary of other choices: B: Chest pain, dyspnea, cough, weight loss, and fever are more commonly associated with lung cancer but not specific to Horner's syndrome. C: Arm and shoulder pain and atrophy of arm and hand muscles are not typical signs of Horner's syndrome. D: Hoarseness and dysphagia are more common symptoms of compression of the recurrent laryngeal nerve, not Horner's syndrome.