If an overweight patient exhibits increased levels of serum insulin, yet persistently elevated blood glucose, which mechanism explains why GLUT4 translocation is impaired in their skeletal muscle cells?

💡 Explanation

Insulin resistance develops because prolonged exposure to high insulin levels causes downregulation of insulin receptor signaling pathways in muscle cells, hindering GLUT4 translocation. Therefore, glucose uptake is reduced, rather than increased glucose synthesis or glucagon action being responsible.

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