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: Physiology
Insulin increases the entry of glucose into: 
Select and explain. 
A. All tissues, B. Renal tubular cells, C. The mucosa of the small intestine, D. Skeletal muscle
D: Skeletal muscle
Answer: D: Skeletal muscle 
Explanation: Skeletal and cardiac muscle, adipose tissues contain GLUT4, which is stimulated by insulin.