Glucose diffusion in RBC by –
**Core Concept**
Glucose diffusion in red blood cells (RBCs) involves the facilitated diffusion of glucose through the cell membrane, which is necessary for maintaining the energy requirements of the cell. The glucose transporter protein, specifically GLUT1, plays a crucial role in this process.
**Why the Correct Answer is Right**
The facilitated diffusion of glucose in RBCs is mediated by the glucose transporter protein GLUT1, which is embedded in the cell membrane. GLUT1 is a type of glucose transporter that has a high affinity for glucose, allowing it to transport glucose down its concentration gradient from the blood into the RBC. This process is essential for maintaining the energy requirements of the RBC, as glucose is the primary source of energy for the cell.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the type of glucose transporter protein involved in glucose diffusion in RBCs.
* **Option B:** This option is incorrect because it is not a specific type of glucose transporter protein.
* **Option C:** This option is incorrect because it is a different type of glucose transporter protein that is primarily involved in glucose uptake in the small intestine.
**Clinical Pearl / High-Yield Fact**
GLUT1 is a high-affinity glucose transporter that is present in the cell membrane of RBCs, facilitating the diffusion of glucose into the cell. This process is essential for maintaining the energy requirements of the RBC.
**Correct Answer:** D. GLUT1