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Homeostasis, sweat gland, arteriole, hair erector muscle, metabolic rate…
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sweat gland
secretes more sweat --> more water in sweat evaporates from skin surface --> more latent heat of vapourisation lost (more heat lost form skin surface due to evaporation of water carrying heat)
secretes less sweat --> less water in sweat evaporates from skin surface --> less latent heat of vapourisation lost (less heat lost form skin surface due to evaporation of water carrying heat)
arteriole
arteriole dilates (shunt vessel contracts) --> more blood flows in capilllary underneath skin surface --> more heat lost to surroundings via radiation, conduction and convection
arteriole contracts (shunt vessel dilates) --> less blood flows in capilllary underneath skin surface --> less heat lost to surroundings via radiation, conduction and convection
hair erector muscle
hair erector muscle relaxes --> hair flattens against skin --> less air trapped around skin surface --> more heat lost to surroundings
hair erector muscle relaxes --> hair flattens against skin --> less air trapped around skin surface --> more heat lost to surroundings
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