ANT336H1 Lecture Notes - Lecture 9: Cold Response, Hypothermia, Oxidative Phosphorylation
Document Summary
3 main areas: adaptation to temperature body proportions, some physiological changes, behaviour. Inuit"s make igloos to stay warm, in new guinea they build trees houses: adaptation to uv pigmentation, adaptation to hypoxia at high altitudes mostly physiological, some morphological. Large surface area dissipates heat in warm climates. Animals in cold climates are larger than in warmer climates. Smaller body surface relative to body volume minimizes heat loss. Smaller animals have a larger surface area relative to mass (more heat loss) Animals in warmer climates have longer limbs than animals who live in colder climates. Longer limbs have a greater surface area/mass and therefore dissipate heat better. Shorter limbs conserve heat in colder climates. Changes in height don"t change the area/mass ratio. Good correlation between latitude and bi-iliac breadth. This does not apply to the polynesians they live in warm climates but have wide bodies. Explained by continuous exposure to colder temperatures when by the sea ishing and sailing on boats.
