This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart, Circulation, and Blood, Subject name: Physiology
Regulation of coronary circulation 
Select and explain. 
A. Autonomic, B. Autoregulatory, C. Hormonal, D. Sympathetic
B: Autoregulatory
Answer: B: Autoregulatory 
Explanation: Ans. (b) AutoregulatoryRef: Ganong, 25th ed/p.612AutoregulationIt is the capacity of the tissue to regulate their blood flow - intrinsic basal myogenic toneLocal Metabolism is the primary controller of coronary flow - O2 demand is a major factorThis mechanism works well even when the nerves are removed