Human Variation and Race
WELCOME TO THE COLD SIDE: Welcome to the coldest places in the world. Places that are below zero, in the negatives, and still have human life. Ever wonder how the human body adapts to environmental stress? Colder climates disturb homoeostatic creating stress and our normal body temperature 97.7-99 F. If a person body temperature goes below normal then the body drives into different stages to adapt to the cold. When the temperature drops below 94 degrees, we develop hypothermia. SHORT TERM: Short terms adaptation include goosebumps and shivering in response to cold climates. Goosebumps are tiny evaluations of the skin which are caused by contractions of miniature muscles that are attached to each hair. The contraction also causes the hair to stand up when the body is cold. Shivering is another form of short term adaptation, its when the muscles contract and expand in speeding force to try to warm up the body. FACULTATIVE: ...
