This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
[{'content': 'The neurotransmitter agent that is normally released in the SA node of the hea in response to increased blood pressure is \nSelect and explain. \nA. Acetylcholine, B. Dopamine, C. Adrenaline, D. Noradrenaline', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref-KDT 6/e p107 Whenever blood pressure increases there is reflex stimulation of baroreceptors. The release ACh and depresses the hea', 'role': 'assistant'}]