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
Glucose is usually transmitted by: 
Select and explain. 
A. Primary active transport., B. Secondary active transport., C. Facilitated diffusion., D. Simple diffusion.
C: Facilitated diffusion.
Answer: C: Facilitated diffusion. 
Explanation: Glucose is usually transported by facilitated diffusion.