Increased ratio of insulin to glucagon causes
**Core Concept**
The balance between insulin and glucagon is crucial for glucose homeostasis. Insulin promotes glucose uptake and storage, while glucagon stimulates glucose release from storage sites. The ratio of insulin to glucagon determines the body's metabolic state, influencing glucose levels and energy production.
**Why the Correct Answer is Right**
An increased ratio of insulin to glucagon favors glucose uptake and storage. Insulin stimulates the translocation of glucose transporter type 4 (GLUT4) to the surface of muscle and adipose cells, facilitating glucose entry into these cells. Concurrently, insulin inhibits glucose production in the liver by suppressing the expression of key gluconeogenic enzymes, such as phosphoenolpyruvate carboxykinase (PEPCK). This insulin-glucagon imbalance leads to decreased hepatic glucose output and increased peripheral glucose uptake.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option might seem plausible, but it doesn't directly relate to the insulin-glucagon ratio. A decrease in glucagon levels would indeed reduce hepatic glucose output, but it doesn't explain the specific effect of an increased insulin-to-glucagon ratio.
* **Option B:** While an increased insulin level would promote glucose uptake, this option doesn't account for the simultaneous decrease in glucagon levels, which is critical for the insulin-glucagon balance.
* **Option C:** This option is incorrect because an increased ratio of insulin to glucagon would actually decrease glucose production in the liver, not increase it.
**Clinical Pearl / High-Yield Fact**
In patients with diabetes, especially type 2 diabetes, the insulin-glucagon ratio is often disrupted, leading to hyperglycemia. Administering glucagon-like peptide-1 (GLP-1) agonists, which mimic the action of glucagon, can help restore this balance and improve glycemic control.
**Correct Answer:** A. Increased glucose uptake and storage in peripheral tissues, decreased hepatic glucose output.