Thursday, January 12, 2012

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Homeostasis - negative feedback loop


A rise of some factor e.g. X of the internal environment is detected by the sensor. This information is relayed to the integrating center that causes the effector to produce a change in the opposite direction. The initial deviation is thus reversed, thus completing the negative feedback loop.


The same holds true if the factor X is decreased. The integrating center detects a change from the set point and causes necessary effects to bring it back to normal. Below is a diagram that shows negative feedback loops maintain a state of dynamic consistency within the internal environment. 


One such example is regulation of body temperature as explained in the link that follows. Regulation of body temperature


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