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  2. Negative feedback - Wikipedia

    en.wikipedia.org/wiki/Negative_feedback

    A simple negative feedback system is descriptive, for example, of some electronic amplifiers. The feedback is negative if the loop gain AB is negative.. Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by ...

  3. Perceptual control theory - Wikipedia

    en.wikipedia.org/wiki/Perceptual_control_theory

    Perceptual control theory (PCT) is a model of behavior based on the properties of negative feedback control loops. A control loop maintains a sensed variable at or near a reference value by means of the effects of its outputs upon that variable, as mediated by physical properties of the environment.

  4. Biochemical switches in the cell cycle - Wikipedia

    en.wikipedia.org/wiki/Biochemical_switches_in...

    The interaction between the two types of loops is evident in mitosis. While positive feedback initiates mitosis, a negative feedback loop promotes the inactivation of the cyclin-dependent kinases by the anaphase-promoting complex. This example clearly shows the combined effects that positive and negative feedback loops have on cell-cycle ...

  5. Feedback - Wikipedia

    en.wikipedia.org/wiki/Feedback

    Negative feedback: If the signal feedback is out of phase by 180° with respect to the input signal, the feedback is called negative feedback. As an example of negative feedback, the diagram might represent a cruise control system in a car that matches a target speed such as the speed limit. The controlled system is the car; its input includes ...

  6. Bistability - Wikipedia

    en.wikipedia.org/wiki/Bistability

    This signaling network illustrates the simultaneous positive and negative feedback loops whose exquisite sensitivity helps create a bistable switch. Bistability can only arise in biological and chemical systems if three necessary conditions are fulfilled: positive feedback , a mechanism to filter out small stimuli and a mechanism to prevent ...

  7. Homeostasis - Wikipedia

    en.wikipedia.org/wiki/Homeostasis

    In biology, homeostasis (British ... down-regulation and act in negative feedback mechanisms. An example of this is ... a closed loop negative feedback system to ...

  8. The US economy could be on the precipice of triggering a ...

    www.aol.com/us-economy-could-precipice...

    The US economy faces a potential negative feedback loop ahead of Friday's jobs data release. Nomura analysts compared current indicators to the 2000s dot.com crash and subsequent recession.

  9. Hormone - Wikipedia

    en.wikipedia.org/wiki/Hormone

    This is an example of a homeostatic negative feedback loop. Breakdown of the hormone. Exocytosis and other methods of membrane transport are used to secrete hormones when the endocrine glands are signaled. The hierarchical model is an oversimplification of the hormonal signaling process.