Insulin mediated uptake of glucose into muscle is through?
**Core Concept**
Insulin-mediated glucose uptake into muscle cells is a crucial process for maintaining blood glucose homeostasis, involving specific glucose transporters. This process is essential for reducing blood glucose levels after a meal. The primary glucose transporter involved in this process is responsive to insulin signaling.
**Why the Correct Answer is Right**
The correct answer is related to the **GLUT4** glucose transporter, which is primarily found in adipose tissue and skeletal muscle. Insulin stimulates the translocation of **GLUT4** to the cell surface, facilitating glucose uptake. This process is mediated by the insulin signaling pathway, which activates **PI3K** and **AKT**, leading to the translocation of **GLUT4**.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the primary glucose transporter involved in insulin-mediated glucose uptake in muscle cells.
**Option B:** This option is also incorrect as it does not specify the correct glucose transporter.
**Option C:** Similarly, this option is incorrect as it does not relate to the insulin-mediated process.
**Clinical Pearl / High-Yield Fact**
Remember that **GLUT4** is the primary glucose transporter involved in insulin-mediated glucose uptake in muscle and adipose tissue. Impairment of **GLUT4** translocation is a key feature of insulin resistance in type 2 diabetes.
**Correct Answer:** D. GLUT4