NEGATIVE FEEDBACK,NEGATIVE FEEDBACK MECHANISM AND EXAMPLES

NEGATIVE FEEDBACK,

NEGATIVE FEEDBACK MECHANISM AND EXAMPLES

Negative feedback:

Negative feedback is a type of Homeostasis where the product came, decreases the initial stimulus.

Mechanism of Negative feedback:

Most of the control systems of the body act by this mechanism.

If there is any change in the output of the systems, the effects of the change are made to known (feedback) to the sensor which initiates the sequence of events. In negative feedback system, increase in output of a system results in a decrease in the input leading to stability of the system. If some factors become excessive or too little, control system initiates a feedback which tends to push the factors in the direction opposite (negative) the direction of original change.

Examples of Negative feedback:

 A decrease in body temperature leads 

to responses which tend to increase body temperature, i.e. return it to original value. 

Negative feedback is the most common homeostatic mechanism in the body as it is capable of causing stability of an internal environment variable (factor). Homeostatic control mechanisms cannot maintain complete constancy of any given factor of internal environment. Therefore, any regulatory factor (variable) will have a narrow range of normal values.