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Related Concept Videos

Feedback Loops01:01

Feedback Loops

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In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
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Cell Signaling Feedback Loops01:07

Cell Signaling Feedback Loops

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Positive and negative feedback loops are crucial for regulating biological signaling systems. These feedback loops are processes that connect output signals to their inputs.
Negative feedback loops
Most signaling systems have negative feedback loops that can perform different functions such as output limiter, and adaptation.
Output limiter
Upon receiving an input signal, the cellular response rapidly increases until a threshold is reached. Beyond this threshold, a negative feedback loop...
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Positive and Negative Feedback Loops01:18

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Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires  maintaining an internal dynamic equilibrium:
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Feedback Inhibition00:46

Feedback Inhibition

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Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
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Effects of feedback01:24

Effects of feedback

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Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...
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Feedback control systems01:26

Feedback control systems

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Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
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Related Experiment Video

Updated: Jan 22, 2026

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
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Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

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Mechanochemical Feedback Loops in Development and Disease.

Edouard Hannezo1, Carl-Philipp Heisenberg1

  • 1Institute of Science and Technology Austria, Klosterneuburg, Austria.

Cell
|June 29, 2019
PubMed
Summary

Mechanical and biochemical signals are crucial for organism development and disease, involving complex feedback loops. Understanding these mechanochemical interactions at molecular, cellular, and tissue levels is key.

Area of Science:

  • Biophysics
  • Developmental Biology
  • Systems Biology

Background:

  • Mechanical and biochemical signals are increasingly recognized for their roles in biological development and disease.
  • Complex organism development may depend on feedback between mechanical and biochemical patterning.
  • Mechanosensation at the molecular level and emergent properties at the system level mediate these feedbacks.

Purpose of the Study:

  • To review recent experimental and theoretical advances in understanding mechanochemical feedback loops.
  • To highlight the role of dynamic tissue geometry, flow, rheology, and cell fate specification in these processes.

Main Methods:

  • Review of experimental findings.
  • Analysis of theoretical models.
  • Synthesis of current knowledge on mechanochemical signaling.

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Related Experiment Videos

Last Updated: Jan 22, 2026

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Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

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Main Results:

  • Mechanochemical feedback loops are integral to multiple developmental and disease processes.
  • Dynamic changes in physical properties (geometry, flow, rheology) and cell behavior (cell fate) are key components.
  • Feedback operates from molecular mechanosensation to emergent system properties.

Conclusions:

  • Mechanochemical feedbacks are fundamental to understanding development and disease.
  • Further research integrating experimental and theoretical approaches is needed to fully elucidate these complex interactions.