This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nerve Physiology, Subject name: Physiology
[{'content': 'Intensity of sensory stimulation is directly related to: \nSelect and explain. \nA. Duration of action potential (AP), B. Frequency of AP, C. Amplitude of AP, D. All of the above.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e. "Frequency of Action potential There are two methods by which brain detects the intensity of a sensory stimulus (differentiates between two stimuli of different intensities)by variation in the frequency of the action potentials generated by the stimulus in a given receptor.By variation in the number of receptors activated by the stimulus.Also knowWeber - Fechner law*It states that the magnitude of the sensation felt in proportionate to the log of intensity of the stimulus*.Example - A person holding 30 grams weight in his hand can barely detect a 1 gm rise in weight (a rise than 1 gm would not be detectable). But when he holds 300 gm of weighty he can rarely detect a 10 gm increase in weight (a rise less than 10 gm would not be detectable to him. So a 300 gm wt. and (Say) 307 gm of weights would appear same to him.)This is expressed mathematically asInterpreted signal strength = Log x stimulus intensity + constant', 'role': 'assistant'}]