SOCI 1001 Lecture Notes - Lecture 6: Subcutaneous Tissue, Gray Jay, Brown Adipose Tissue
18 Nov 2018
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Solutions: for animals that stay active (dress for weather) grow more hair/underfur (traps body heat, birds grow bulkier fur. Black-capped chickadee: animals also add extra layers on inside. They shiver to generate heat (grey jay) Shivering thermogenesis: colour can provide warmth. Dark colours release heat faster (great for absorbing heat) Snowshoe hares gain 27% in coat"s insulation value by being white. Big ears, long legs, tail is not. Short legs & tail compared to deer. Shorter & bulkier to lower surface area to volume ratio & conserve heat (bergmann"s. Rule) when ratio is closer 1 better. Blood going down to feet is cooled down & going back up is warmed up in order to conserve body heat in rete mirabile vein & artery network. Colour, body shape, extremity size, rete mirabile. How an animal breathes in winter & conserves heat + energy. Especially when conifers are covered with snow (even better)
