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I don't know if this directly answers your questions, but I think some confusion may stem from an underlying misconception of receptor vs receptor cell. In most contexts (though not this one), 'receptors' do not refer to cells. Receptors are proteins on the cell membrane that transduct some signal/stimulus to the cell. Sometimes a "normal" ...


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Short answer Nociceptors are different from mechanoreceptors. Background Mechanoreceptors in the skin have specialized dendritic regions that facilitate their specific role in sensing different types of mechanical force, e.g., pressure receptors (Merkel’s disks) versus vibration receptors (Pacinian corpuscles and Meissner's corpuscles). See Fig. 1 for ...


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From Wikipedia: The facial pit actually visualizes thermal radiation using the same optical principles as a pinhole camera, wherein the location of a source of thermal radiation is determined by the location of the radiation on the membrane of the heat pit. However, studies that have visualized the thermal images seen by the facial pit using computer ...


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