Final answer:
The school nurse should administer two teaspoons of sugar dissolved in a cup of apple juice to the student with diabetes in order to raise their blood sugar levels and alleviate the symptoms of hypoglycemia.
Step-by-step explanation:
The school nurse should administer Two teaspoons of sugar dissolved in a cup of apple juice to the student with diabetes. The student is experiencing symptoms of low blood sugar, or hypoglycemia, as evidenced by feeling nervous, hungry, tachycardia (rapid heart rate), diaphoresis (excessive sweating), and a blood glucose level of 50 mg/dL (2.8 mmol/L).
In this situation, it is important to quickly raise the student's blood sugar levels. Sugar dissolved in juice is a fast-acting source of carbohydrates that can rapidly raise blood sugar levels. The combination of sugar and juice provides glucose that can be readily absorbed by the body, helping to alleviate the symptoms of hypoglycemia.