P5:Describe the Concept of Homeostasis and the Homeostatic Mechanisms That Regulate Heart Rate, Breathing Rate, Body Temperature and Blood Glucose Levels.

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Unit 5:- Anatomy and physiology for health and social care P5:- explain the concept of Homeostasis Introduction In this essay I will be writing about what homoeostasis is and how it functions, I will also be talking about what an internal environment is, what a negative feedback mechanism is and how we keep out body’s internal environment stable. What homoeostasis is and how it functions Homeostasis is the process of maintaining a constant internal environment despite changing circumstances. For example, this means that pH, temperature, concentrations of certain chemicals, water content etc. in the fluid surrounding body cells (the internal environment) must be kept within a narrow range even when you are consuming acids (vinegar, lemon juice), are in a freezing climate, or are doing vigorous exercise etc. Homeostasis is the maintenance of constant conditions in the internal environment of the body despite large swings in the external environment. Hormones have an important role in this system. Hormones are made of proteins; they are released by glands, in to the blood stream, where they reach target cells. A specific hormone will fit a specific receptor protein, and this brings about a change in that cell. Negative feedback mechanism A negative feedback in the body is where a change the level of one natural leads directly to a drop or increase. For example, shivering or sweating is part of a negative feedback loop in the body designed to counteract changes to core temperature. Other example, if it is cold outside, eventually the internal temperature of the house drops, as cold air seeps in through the walls. When the temperature drops below the point at which the thermostat is set, the thermostat turns on the heater. As the temperature within the house rises, the thermostat again senses this change and turns off the furnace when the internal
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