Provide a Definitionof What Is Homeostasis

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Homeostasis is the property of a system in which variables are controlled so that internal conditions remain steady and relatively constant. Examples of homeostasis contain the regulation of body temperature and the balance between alkalinity and acidity (pH). It is a process that maintains the stability of the human body's internal environment in response to changes in external conditions. (American, 2000) Homeostasis is essentially an internal biological process in which the body maintains internal equilibrium. The variable that is being monitored in homeostasis process is known as the variable or controlled variable. Any condition that causes any changes to the variable or ‘throws it off balance’ in question is also known as the stimulus (or stimuli). A receptor detects the changes that are being made to the variable and it will input information to the control centre along the afferent pathway. The control centre will analyse and interpret the data. After it determines the set point, it will send the effector to that set point through the efferent pathway and bring the variable back to a state of balance. The effector will work in one of the two ways, becoming either negative feedback or positive feedback. Negative effector means the effector will reduce or eliminate the effect of the stimulus, thus returning the variable to a state of balance (meaning that homeostasis is achieved). Positive feedback means that the effector will actually “push” or “speed up” the stimuli’s effect to bring the variable back into its normal homeostatic state. This occurs in the cases of blood, clotting and childbirth. Negative feedback example of this would be blood sugar in the case of blood sugar regulation, the stimulus would be a drop in blood sugar due to an individual skipping a meal. The pancreas receptors will detect the reduced blood sugar levels. The receptors will send a
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