**Core Concept**
Rapid infusion of insulin triggers a series of physiological responses in the body, particularly affecting glucose and electrolyte homeostasis. Insulin, a hormone produced by the pancreas, plays a crucial role in regulating blood glucose levels by facilitating glucose uptake in cells. The rapid administration of insulin can lead to a significant drop in blood glucose levels, potentially causing hypoglycemia.

**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of insulin-induced hypoglycemia. When insulin is rapidly infused, it binds to its receptor on the surface of cells, triggering a cascade of intracellular signaling pathways. This ultimately leads to the activation of glucose transporter type 4 (GLUT4) on the surface of muscle and adipose tissue cells, increasing glucose uptake and causing a rapid decrease in blood glucose levels. The liver, sensing the decreased blood glucose levels, reduces its glucose production, and the kidneys increase glucose excretion, further contributing to the drop in blood glucose.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not address the primary effect of rapid insulin infusion on blood glucose levels.
* **Option B:** This option is incorrect because it is not directly related to the physiological response to rapid insulin infusion.
* **Option C:** This option is incorrect because it is not a known consequence of rapid insulin infusion.

**Clinical Pearl / High-Yield Fact**
It is essential to monitor blood glucose levels closely when administering insulin, especially during rapid infusions, to prevent hypoglycemia. Regular glucose monitoring and patient education on recognizing and managing hypoglycemia are critical in preventing complications.

**Correct Answer: A. Hypoglycemia**