Insulin facilitates glucose uptake in____________?
Correct answer: D. Skeletal muscle
- A. Kidney tubules
- B. Red blood cells
- C. Brain
- D. Skeletal muscle
Explanation
Insulin promotes GLUT4 insertion into the cell membrane of skeletal muscle, increasing glucose uptake. Brain cells and red blood cells use largely insulin-independent transporters, while renal tubular uptake is not the classic target tested here.
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