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P5 Unit 5 homeostasis

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P5 Unit 5 homeostasis
Homeostasis

What is homeostasis?
Homeostasis is the mechanism in our body that regulates and maintains a stable and constant environment. This enables our body to respond to changes in the environment around us as. The homeostatic mechanisms in our body, observe and monitor conditions and will then make a judgment whether to change the way the body functions is order to adapt to the outside surroundings better. The main organs involved in homeostasis are; the brain, liver, skin and kidney’s. The skin is involved as its acts as a protective layer and also regulates body temperature. The liver breaks down harmful substances and the kidneys regulate water levels and waste products. In the brain the hypothalamus controls everything and changing them to fit into the outside surroundings. Negative feedback is also linked in as it is the process of homeostasis. It is negative because it is in a negative situation and will not kick it unless there’s something wrong.

Body temperature
When we exercise the body has to work harder, the body temperature would increase this is due to organs having to work harder to get oxygen to muscles. The metabolic rate that produces more energy has to increase in order for more energy to be released. The heart has to pump more blood around the body in order to deliver oxygen to the working muscles so they can carry on working at that capacity.
What mechanisms are there to cool the body down?
Sweating-glands are stimulated to release sweat
Liquid turn into gas
Vasodilation-your body carries most of the heat energy around your body
There are capillaries underneath your skin that can be filled with blood if you get too hot
This brings the blood closer to the surface of the skin so more heat can be lost, this is why we look red when we’re hot.
What mechanisms are there to warm the body up?
Vasoconstriction-this is the opposite of vasodilation
The capillaries underneath your skin get constricted (shut

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