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
[{'content': 'Slowest conduction of velosity occurs in \nSelect and explain. \nA. Atrial muscle, B. A.V. node, C. Purkinje fibre, D. Ventricular muscles', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (A.V. node) (549 - Ganong 22nd) (487-488-K.S 4th) (492- Ganong 23rd)The velocity of impulse is maximum in purkinje fibres and minimum at AV nodeTissueConduction rate (m/s) (Ganong)K. Sembulingum* S A node0.05Intemodal fibres - l.0m/s* Atrial pathway1Atrial muscle = 0.3m/s* A V. node0.050.05 m/s* Bundle of His10.12 m/s* Purkinje system44 m/s* Ventricular muscle10.5 m/s', 'role': 'assistant'}]