This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'Starlings law implies \nSelect and explain. \nA. Increased VR- increased CO, B. Increased discharge - increased CO, C. Increased HR- increased CO, D. Increased BP- increased CO', 'role': 'user'}, {'content': 'Answer: A \nExplanation: This intrinsic ability of the hea to adapt to increasing volumes of inflowing blood is called the frank starling mechanism. Basically, the Frank-Starling mechanism means that the greater the hea muscle is stretched during filling, the greater is the force of contraction and the greater the quantity of blood pumped into the aoa.Ref: Guyton and Hall textbook of medical physiology 13th edition. Page: 119', 'role': 'assistant'}]