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Example of Negative Feedback

'Negative feedback' doesn't mean criticism. It's an actual scientific expression, describing a process whereby an action causes a result which progressively or systematically reduces the processes of the action. The net effect is of a ratio between input and output.

Examples of Negative Feedback:

The action of water in a moving around in a bathtub progressively reduces as gravity provides negative feedback.
Erosion is a force which is affected by the negative feedback from adjustment of land surfaces which alter and reduce the effect of the erosion.
In electronics, feedback effectively acts against input, by creating an output which diminishes it.


Image Example of Negative Feedback:

Most endocrine hormones are controlled by a physiologic negative feedback inhibition loop, such as the glucocorticoids secreted by the adrenal cortex. The hypothalamus secretes corticotropin-releasing hormone (CRH), which directs the anterior pituitary gland to secrete adrenocortocotropic hormone (ACTH). In turn, ACTH directs the adrenal cortex to secrete glucocorticoids, such as cortisol. Glucocorticoids not only perform their respective functions throughout the body but also negatively affect the release of further stimulating secretions of both the hypothalamus and the pituitary gland, effectively reducing the output of glucocorticoids once a sufficient amount has been released.