Biology / Bio 2873 · Atom · ~20 seconds
Receptive Field and Receptor Specificity
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A receptor's receptive field is the region in space where a stimulus can activate it, and receptor specificity means each type responds mainly to one kind of stimulus.
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A touch receptor's receptive field requires contact; a visual receptor's field can reach light-years away.
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A free nerve ending shows little specificity, responding to touch, temperature, and pain alike, unlike most receptor types.