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This is an emotional response which elicits a physical response. All emotions stimulate the hypothalamus, a part of the brain, which controls responses such as goose bumps, increased heart rate, and sweating. With goose bumps, the hypothalamus is sending messages through the nerves to contract muscles in the skin, in effect creating 'goose bumps'. More ...


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Short answer Slowly adapting mechanoreceptors in the skin mediate the perception of static pressure stimuli, while rapidly adapting skin receptors mediate swiftly changing (e.g., vibratory) stimuli. Background There are various skin receptors. Hairy skin, such as that encountered on the arm, contains at least four specialized mechanoreceptors, namely ...


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Since there are different formulations for anti-aging creams, it would be helpful to focus on the specific compound or combination of compounds. According to a comprehensive literature review done in 2007, certain compounds (Vitamin C, alpha-hydroxy acids, Vitamin A, Vitamin B derivatives, and botanicals) have had varied success in literature ...


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The lines on the hand are known as flexion creases, and they exist because in their absence, the skin will stretch outwards when the palm is closed due to the decreased surface area of the closed palm, causing problems with gripping. Developmental disorders such as Down Syndrome often cause there to be only one palm line, known as the simian crease, as ...


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The human skin is indeed made off a number of different layers, the three most important are epidermis, dermis and hypodermis (also called subcutaneous fat), see the figure (from here) for details: All three layers can be subcategorized further, I'll only give a few details here. More can be found for example in the Wikipedia article on skin. Epidermis: ...



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