Human Variation
Human Variation 1. Homeostasis is a condition of stability within a biological system- so basically what you are experiencing reading this in your air-conditioned house and food in the pantry. However, the human lifestyle was not always this comfortable (and still is not for many people in developing countries) and because of this, we see a great amount of variation in our species. Extreme temperatures disrupt our homeostasis and can prove lethal. But, through adaptation and acclimation, our earliest ancestors have managed to survive without modern day technology, and our younger ancestors to modern day humans also rely on technological (cultural) advances. One environmental stress that I am going to focus in on is the Cold. The can kill even the strongest of people, and often in extreme conditions will lead to hypothermia- where the body’s temperature drops too low due to failure of the hypothalamus. Cold weather can also lead to heart problems later on, due to the increas...