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
[{'content': 'Laminar flow is dependent ona) Critical velocityb) Viscosityc) Constant velocityd) Critical closing pressure \nSelect and explain. \nA. ab, B. a, C. ad, D. bc', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The flow of blood (Laminar or turbulent) depends on\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Fluid density (S)\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Tube diameter (D)\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Velocity of fluid (V)\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Viscosity of fluid (n)\nThis can be expressed by Reynold’s number (R) = SDV/n\n\xa0\nNormal flow is laminar. But if the velocity crosses a critical limit (Critical velocity) flow becomes turbulent. If R>2000, flow is turbulent.', 'role': 'assistant'}]