During every moment of your life, trillions of chemical reactions are taking place in your body. The enzymes that control these reactions work best within a narrow range of conditions. One of these conditions is your internal body temperature, which should remain between 98.2 ℉ and 98.8 ℉.
If it rises only a few degrees, you could easily die from overheating. At temperatures over 106℉, many enzymes stop functioning. If your internal temperature falls below 80℉, your heart may fail.
Likewise, the levels of trace minerals in your body must stay within strict limits. For instance, if calcium levels are too high, you can slip into a coma. If they are too low, your heart beat becomes irregular.
You live in a constantly changing environment. Your body must cope not only with temperature changes but also with pollution, infection, stress, and many other conditions. Every change is a challenge to your body.
The outlined content above was added from outside of Formative.
What keeps the human body from breaking down every time the internal or external environment changes?
(1 word answer)
A system to maintain homeostasis must have at least four parts that function together. Name these parts.
(_______, _______, _______, _______)
Looking at the image above, normal body temperature would be which part of the control system?
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