ANT 230 Lecture Notes - Lecture 23: Vasoconstriction, Vasodilation, Homeostasis
12 Aug 2016
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Document Summary
Human variation is the result of adaptations to environmental conditions. Physiological response to the environment operates at two levels: Long term evolutionary changed characterize all individuals within a population or species. Short term temporary or developmental/permanent physiological response. Stress: any factor that acts to disrupt homeostasis. Has to do with the body shape of mammals. Describes the relationship bw body size, proportion and climate. Long term adaptations to heat evolved in our ancestors. Increase blood flow to the surface of the body so that you can lose heat. Decrease blood flow to surface to maintain heat inside the body. Multiple factors produce stress on the human body at higher altitudes. We are supposed to eat a lot of meat. In the past 10,000 years, cultural change has accelerated. Biological development occurs from embryo to old age. Cultural factors interact with genetically based characteristics.
