This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Glucose is transpoed in the presence Na+ ions in intestine. This is a type of 
Select and explain. 
A. Secondary Active transpo, B. Primary active transpo, C. Facilitated diffusion, D. Simple diffusion
A: Secondary Active transpo
Answer: A: Secondary Active transpo 
Explanation: The active transpo of Na+ into the ECF by Na+-K+ pump is coupled to the transpo of other substances across the cell membrane against their concentration gradient. The energy for the transpo is not directly derived from ATP hydrolysis. Na+ Cotranspo of glucose is an example(Ref: Diseases. Textbook of medical physiology-Geetha)