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
True regarding animals that are chronically exposed to cold? 
Select and explain. 
A. Increased sympathetic stimulation, B. Increased vagal action, C. Increased insulin levels in blood Decrease, D. blood supply to adipose tissue
A: Increased sympathetic stimulation
Answer: A: Increased sympathetic stimulation 
Explanation: A i.e. Increased sympathetic stimulation