Homeostasis Biology 91604 (3.4B). •Describe The Purpose

1604 WordsMar 16, 20177 Pages
Homeostasis Biology 91604 (3.4B) • Describe the purpose of the homeostatic system The definition of homeostasis: “Homeostasis involves a control system by which an animal maintains a stable internal environment, despite fluctuations in their environment.” Purpose of homeostasis according to referenced website: “The purpose of homeostasis is to maintain a normal balance throughout the body in regards to: temperature, salt concentration, water concentration and food intake. The human body has very little room for error in regards to these factors as these can be the balance between life and death.” This refers to the control of the body’s functions such as temperature, blood glucose, water concentration. In the case of blood glucose,…show more content…
This is what happens in the homeostatic system of blood glucose regulation, using a negative feedback mechanism. In the model of a generalised homeostatic system, there are many components to it. These are important to keep the system at a set point that will “maintain a stable internal environment”, which means keeping blood glucose levels at a point where cells will work optimally. A variable in relation to the homeostatic system is the amount of glucose in the blood, this can be at the set point (approximately 5 mM) or above or below the set point which would result in low or high blood glucose. The sensor/ receptor is “Structures that detect change.” This means that anytime blood glucose levels rise or fall, above or below approximately 5 mM, the sensor will be able to inform the rest of the body. The controller releases the appropriate hormones needed to control the blood sugar levels, Hormones are the chemical messages that are produced when the controller is told that the blood glucose level is too high or too low, depending on this, the hormones produced can either be glucagon (to raise blood glucose) or insulin (to lower blood glucose). Insulin is the ‘key’ to unlocking cells to let the glucose in. An effector is defined as “A cell or organ that produces a physiological

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