Our body temperature does not change with external temperature. Explain.
Answers
Answer:
Our body temperature does not change with external temperature because thermoregulation is a mechanism by which mammals maintain body temperature with tightly controlled self-regulation independent of external temperatures.
Explanation:
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Answer:
Our body has several defence mechnisms to handle fluctuations in ambient temperature. It is governed by hypothalamus in our brain.
Explanation:
Basically, heat is generated by the friction of blood flow in our blood vessels. Our body also has fat which is capable of insulating us from either the hot or cold climate.
Our hypothalamus tries to keep the body temperature near 98.6 degrees. It directs the dilation or contraction of our blood vessels depending on the surrounding temperature of the body. When the blood vessels are dilated, they become more closer to the skin and so heat is ejected away from the body. This happens during hot condition when body has to dispose the heat away from it. When blood vessels contract, they will move farther from the skin and hence the heat lost to the environment will be less. This happens in cold conditions so that body can retain some heat.
Another mechanism used by our body during hot conditions is based on evaporative cooling. Most of the water content of our body is stored in the middle layer of skin. When the body temperature rises above a certain limit, the hypothalamus makes the skin to release them as sweat. The sweat will evaporate resulting in a enormous cooling effect.