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Positive feedback is used in digital electronics to force voltages away from intermediate voltages into '0' and '1' states. On the other hand, thermal runaway is a type of positive feedback that can destroy semiconductor junctions. Positive feedback in chemical reactions can increase the rate of reactions, and in some cases can lead to explosions.
Positive feedback loops play a role by switching cells from low to high Cdk-activity. 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.
inhibition of run-away reactions when coupled with a positive feedback loop; creating an oscillator by taking advantage in the time delay of transcription and translation, given that the mRNA and protein half-life is shorter; positive feedback: the gene product upregulates its own production directly or indirectly, which can result in
It is an example of positive feedback in biology. The Ferguson reflex occurs in mammals. ... This causes myometrial contraction and further positive feedback on the ...
In unicellular organisms such as bacteria, signaling can be used to 'activate' peers from a dormant state, enhance virulence, defend against bacteriophages, etc. [45] In quorum sensing, which is also found in social insects, the multiplicity of individual signals has the potentiality to create a positive feedback loop, generating coordinated ...
Negative feedback processes are those that maintain particular conditions by reducing (hence 'negative') the difference from a desired state, such as where a thermostat turns on a heater when it is too cold and turns a heater off when it is too hot. Positive feedback processes increase (hence 'positive') the difference from a desired state. An ...
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Human biology; Ichthyology ... vast numbers of positive and negative feedback loops are being discovered, that, together, maintain a metastable condition, sometimes ...