Homeostasis P5 Essay

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Homeostasis P5 Homeostasis is the condition where the body’s internal environment is maintained within narrow limits. The conditions stay relatively the same despite PH changes and temperature alterations in the outside external environment. Negative feedback occurs in each concept as our body tries to get the body temperature blood glucose levels, and other various levels back to normal. The body and temperature control The body’s temperature is controlled by the hypothalamus which is situated in the brain. It actions responses if the temperature goes below 36.1° or above 37.8°. The average body temperature is 36.8°. The hypothalamus contains control mechanisms and a key temperature sensor, when the body temperature alters slightly it activates various responses depending on the change. Responses include; sweating, vasodilation, vasoconstriction, and shivering. Sweating is where sweat from our skin is evaporated in order to decrease our core temperature. Vasodilation is where the blood vessels dilate due to the rise in body temperature; this allows more blood to flow near the surface. The blood then loses heat through the skin, this assists with cooling the circulating blood. Vasoconstriction is the response to the body temperature decreasing; the blood vessels constrict preventing warm blood from nearing to the surface- thus the reduction in heat being lost. Shivering is our bodies response to our temperature falling, muscles around vital organs start shake in minute movements- this creates energy which increases warmth. The control of blood glucose levels It’s important our body is able to control and regulate our blood glucose levels; this is done by our pancreas. The normal blood sugar level is around 4-8 mmol/l. It’s important our body tries and maintains this level so that there is a constant supply to cells so they can metabolise to ATP. If the

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