This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Physiology
Which sugar is taken up by enterocytes by facilitated diffusion? 
Select and explain. 
A. Glucose, B. Galactose, C. Fructose, D. Xylose
C: Fructose
Answer: C: Fructose 
Explanation: Ans. C. FructoseFructose is taken up by enterocytes by facilitated diffusion. Both glucose and galactose are taken up by enterocytes through a sodium-dependent transporter (secondary active transport). Xylose and sucrose are not taken up by enterocytes.