PSYC 1001 Lecture Notes - Lecture 5: Torpor, Roost Records, Subcutaneous Tissue
14 Oct 2017
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Document Summary
Chemicals produced and let out by the plant as a chemical messenger. Tells the plant to get ready for attack. Ectotherms: don"t produce their temperature internally but depends on their environment. Endotherms: produce temperature internally and can maintain it. Tend to put on layers to stay warm. Thick hair traps heat next to the body. Down feathers underneath (the feathers help trap heat) Animals also add extra layers on the inside. Birds adds subcutaneous fat for fuel rather than warmth. When birds shiver their flight muscles, it gives body heat off that is trapped by the feathers. Shiver to generate heat (some might even shiver for 24 hours a day) Black absorbs solar light but also expels it faster than white does. They gain 27% in the coat"s insulation value by being white. Northern animals are lighter in colour than their southern counterparts. Large ears, long legs, long tail is not good for the cold.
