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: Pharmacology
[{'content': "Pavlov's experiment on dogs shows \nSelect and explain. \nA. Conditional response, B. Unconditioned response, C. Procedural memory, D. Familiarity", 'role': 'user'}, {'content': "Answer: A \nExplanation: In classical conditioning, the conditioned stimulus (which usually does not produce the response),\xa0when paired with the unconditioned stimulus (stimulus which usually produces a response), directly produces a response,\n\xa0The typical example of classical conditioning is Pavlov's experiment. \n\xa0Normally food produces salivation in a dog.\xa0Therefore salivation in response to food is called the unconditioned response and the stimulus, i.e., food is called the unconditioned stimulus. Under normal circumstances,\xa0a dog does not salivate at the sound of a bell. However,\xa0if the sound of the bell is paired consistently with the presentation of food, the dog begins to salivate to the sound of the bell even if the food is not presented.\xa0This learned response, i.e., salivation to a sound of the bell without food, is called conditioned response and the stimulus (sound of a bell) is called a conditioned stimulus.\n\nBefore conditioning \n\n\xa0Unconditioned stimulus (food) → Unconditioned response (salivation)\n\xa0Unconditioned stimulus (food) + Conditioned stimulus (Bell) → Unconditioned response Q\n\n(salivation) After conditioning\n\n\xa0Conditioned stimulus (Bell) → Conditioned response (salivation)", 'role': 'assistant'}]