Which of the following would be a sign that a diabetic patient may be experiencing hypoglycemia?

Sweating and a rapid heartbeat are hallmark signs of hypoglycemia, which occurs when blood sugar levels drop to dangerously low levels. When the body senses low glucose, it triggers the release of adrenaline (epinephrine) to stimulate the liver to release stored glucose, resulting in symptoms like a fast heart rate and excessive perspiration. These physiological responses are part of the body's attempt to restore glucose levels to normal.

In contrast, excessive thirst and frequent urination are more commonly associated with hyperglycemia, or high blood sugar. High energy levels are also not indicative of hypoglycemia; rather, a person experiencing low blood sugar may feel weak, shaky, or fatigued due to the lack of glucose available for energy. Thus, the signs of a rapid heartbeat and sweating provide clear indications that a diabetic patient may be experiencing hypoglycemia.