The rate of hormone biosynthesis and secretion is often regulated by a Homeostasis negative feedback control mechanism.

These discoveries stimulated the study of hormonal feedback control mechanisms which are central to all aspects of modern endocrinology.

These responses suggest a rich system of homeostasis and feedback control mechanisms, but they complicate the interpretation of experimental studies of Wnt signal transduction in which the time course of induction cannot be controlled easily.

In the non-diabetic, the feedback control mechanism connecting insulin release and blood glucose level is very effective, and it is not possible to adjust it except that blood glucose levels rise slightly during digestion and absorption of glucose.

Very precise feedback control mechanisms ensure that, though skin temperatures may vary considerably, core temperatures remain steady within 1 C or less; for useful discussions of how this is achieved, even in polar environments, see Kleiber (1961) and Schmidt-Nielsen (1975, 1976).

The Three-Layer Architecture is a hybrid reactive/deliberative robot architecture developed by R. James Firby that consists of three layers: a reactive feedback control mechanism, a reactive plan execution mechanism, and a mechanism for performing time-consuming deliberative computations.