Human Variation and Race
A normal healthy individual's body temperature is about 98.6 degrees Fahrenheit. When the body senses it is too cold the hypothalamus will send signals to your muscles to shiver and create warmth to maintain homeostasis. Climates that are extremely cold come with the risk of the body going into hypothermia. This is a life threatening drop in core temperature to subnormal levels. Hypothermia occurs when the core body temperature drops to 94 degrees Fahrenheit, thus disrupting the body's ability to maintain homeostasis. There are many cultural adaptations that humans have used to adapt to this stress. One of them is drinking alcohol to keep warm. This increases blood flow to the body's extremities and provides a feeling of warmth. Another adaptation that humans have used is insulated clothing to stay warm. In cold climates it helps the body keep in heat wearing windbreaker jackets, hats that cover the ears, mittens to cover the hands and thermals under their clothin...