This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Adipocytes use which of following: 
Select and explain. 
A. GLUT1, B. GLUT2, C. GLUT3, D. GLUT4
D: GLUT4
Answer: D: GLUT4 
Explanation: GLUT4 is expressed exclusively in adipocytes and skeletal and hea muscles, and translocation of GLUT4 from an intracellular pool to the plasma membrane is a major mechanism of the insulin-stimulated glucose uptake in these tissues adipocytes, and Chinese hamster ovary (CHO) cells expressing Gq-coupled bradykinin B2 receptors (BK2Rs).The bradykinin-stimulated GLUT4 translocation may explain the exercise-induced glucose uptake in muscle cells.