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
Na+ uptake at basolateral surface of apical cells is by 
Select and explain. 
A. Active transpo, B. Passive transpo, C. Diffusion, D. Osmosis
A: Active transpo
Answer: A: Active transpo 
Explanation: Ans. is 'a' i.e., Active transpo