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There are two types of sweat glands: (1) eccrine sweat glands and (2) apocrine sweat glands. Eccrine sweat glands are present from birth in humans and secrete sweat that is mostly water and functions in evaporative cooling. Apocrine sweat glands are found in the armpits and groin regions and become active in humans at puberty (although the distribution ...


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Information available on this is huge. I will pin point main points. Generally this signalling will involve four components viz. receptors, transduction machinery, perireceptor processes and downstream processing of chemosensory information. Receptors First step is to receive signal (here odorant or chemicals). Following figure shows comparison between ...


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Yes, there is something like an "odor afterimage", at least in rodents. This is the paper: http://www.pnas.org/content/110/35/E3340.abstract But have in mind that this phenomenon is quite different from visual afterimages. First, it doesn't depend strictly on "adaptation", because adaptation is a property of the sensory organ, not of the brain. Second, ...


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One olfactory acuity rating method that has found acceptance in some studies (despite the commercial-sounding name) is based on "Sniffin' Sticks," "a test of nasal chemosensory performance that is based on penlike odor-dispensing devices. It is comprised of three tests of olfactory function: tests for odor threshold, discrimination and identification. ...


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The problem with odors is that no known odorant hits only one olfactory receptor. A saturating concentration of compound X for receptor A might be saturating another receptor B, but not receptor C. If you now decrease the concentration, receptor A is still saturated, receptor B is only partially activated and receptor C is not activated at all. Since smell ...



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