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ANSWER: body experiences cold environment, body starts shivering, muscles start contracting, body raises the internal temperature
The feedback mechanism for regulating internal temperature is to survive in a cold environment. It is done when the body first experiences cold, then the muscles start to contract which results in shivering. To this, the body responds by raising the temperature.
What is thermoregulation?
It is the mechanism by which a stable internal temperature of the body is maintained. This is a way for the body to maintain homeostasis in conditions of extreme temperature.
The normal temperature of the body ranges from 37°C (98°F) to 37.8°C (100°F). This is a very narrow range and anything above or below this is considered abnormal.
A temperature lower than 35°C will result in hypothermia. This can lead to brain damage, cardiac arrest or even death. A temperature higher than 42°C is also fatal and can also result in death.
Thermoregulation is controlled by the hypothalamus. It can sense if the internal temperature is too high or lower than normal. It then signals muscles, glands and organs and they work to lower the temperature or to increase it
Therefore, the correct sequence is 2,4,1,3.
Read more about thermoregulation, here
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