Which graph best represents homeostatis? USE EVIDENCE FROM THE TEXT TO SUPPORT YOUR ANSWER What is homeostasis?Homeostasis is the process by which the body regulates its internal environment for chemical and biological processes to occur.Some of the more important variables that the body needs to control include temperature, and the levels of blood sugar, oxygenand carbon dioxide. A number of organs are involved in homeostasis, and these include the lungs, pancreas, kidneys and skin.Lungs and RespirationRespiration is a process that uses glucose to create energy. It is the most important reaction taking place within the human body.Critical to the respiration process is the regulation of oxygen levels within the blood, which is carried out by the lungs. In additionto energy, respiration creates carbon dioxide from the broken down glucose. The fevel of carbon dioxide in the bloodstream is anindirect measure of blood oxygen levels. Special cells in the brain detect the carbon dioxide level in the blood, and if it is toohigh, the brain sends nerve impulses to stimulate the muscles that control breathing. The lungs then fill with air faster, increasingthe amount of oxygen in the bloodstream. If carbon dioxide levels within the blood are low, the brain cells do not stimulate nervecells, reducing the rate of breathing.Pancreas and Blood GlucoseThe regulation of blood-glucose levels is essential for the survival of the human body. The pancreas, a small glandular organlocated close to the stomach, has a number of functions. One of the most important is the regulation of blood-glucose levels. Thepancreas contains special cells known as the Islets of Langerhans that detect blood-glucose levels. If the bloód-glucose levelsare too high, the cells release the hormone insulin to stimulate liver, muscle and fat cells to absorb glucose from the blood andstore it as glycogen or starch. When blood sugar levels are too low, the cells release another hormone called glucagon.Glucagon acts on the liver, muscle and fat cells and stimulates them to convert glycogen to glucose, releasing it into the blood.Kidneys and Water RegulationWater acts as an essential solvent that allows glucose, salt and other chemicals to travel throughout the body. Kidneys regulatethe amount of water present in the human body. When the level of water in the bloodstream becomes too low, thehypothalamus in the brain releases a large quantity of the chemical anti-diuretic hormone, ADH. ADH travels through the bloodand stimulates the kidneys to open water channels within its tubule walls, allowing water to diffuse back into nearby blood vesselsand reducing the amount of water in urine. When too much water is present in the blood, the hypothalamus releases smalleramounts of ADH. This causes the kidneys to close water channels within the tubule walls, increasing the amount of water in urine.Skin and SweatThe body's temperature is tuned to approximately 98.6 Fahrenheit, which allows the body's biological enzymes to function atoptimum level. When the body temperature rises, the hypothalamus sends nerve signals to sweat-producing cells in thein. Thebody can sweat one to two liters of water per hour, which helps to cool the body. The skin also has tiny muscles on its suitacecalled arrector pili. These muscles control the orientation of hairs on the skin. When the body is too hot, the muscles relax and thehairs lay flat to release heat. When the body is too cold, the arrector pili muscles contract, leading the hairs of the skin to stand upand insulate the body.It is important to emphasize that homeostatic reactions are inevitable and automatic if the system is functioning properly, andthat a steady state or homeostasis may be maintained by many systems operating together. For example, flushing is another ofthe body's automatic responses to heating: the skin reddens because its small blood vessels automatically expand to bring moreheated blood close to the surface where it can cool. Shivering is another response to chilling: the involuntary movements burnbody tissue to produce more body heat. Level ofLevel ofLevel ofsubstancesubstancein thebodysubstancein the bodyin thebodyTimeTimeTimeGraph 1Graph 2Graph 3

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It is very important to maintain the constant internal parameter inside the body through…