concept

positive feedback mechanism

Also known as: positive feedback cycle, positive feedback system

Facts (11)

Sources

Homeostasis and Feedback Loops | Anatomy and Physiology I courses.lumenlearning.com Lumen Learning 7 facts

claimThe amplification of labor contractions is a positive feedback mechanism where the baby moving into position stretches the cervix, which increases the strength and frequency of contractions until birth occurs and the stretching stops.

claimLactation is an example of a positive feedback mechanism.

claimPositive feedback mechanisms have the potential to produce a runaway process unless a counter-balancing or shut-down process exists.

claimThe amplification of labor contractions is an example of a positive feedback mechanism.

claimDuring blood clotting, a cascade of enzymatic proteins activates each other to form a fibrin clot, and the enzyme thrombin creates a positive feedback cycle by activating a protein that preceded it in the cascade, leading to further increases in thrombin.

claimA positive feedback mechanism is a system where the output stimulates the system to further increase that output.

claimThrombin is an enzyme in the blood clotting pathway that acts on the next protein in the pathway and also activates a protein that preceded it, creating a positive feedback cycle where an increase in thrombin leads to further increases in thrombin.

4.4: Feedback Loops - Biology LibreTexts bio.libretexts.org LibreTexts Feb 28, 2021 2 facts

claimPositive feedback loops or cycles are commonly described using terms such as "snowballing" and "chain reaction."

claimWithout a counter-balancing or "shut-down" process, a positive feedback mechanism has the potential to produce a runaway process.

What Is Homeostasis? - Cleveland Clinic my.clevelandclinic.org Cleveland Clinic Feb 11, 2025 1 fact

claimHemostasis, or blood clotting, functions as a positive feedback mechanism where clotting factors in the blood activate to seal a wound and summon additional clotting factors until bleeding stops.

Feedback Mechanisms | Overview & Research Examples - Perlego perlego.com Perlego 1 fact

claimUterine contractions during the birth of a baby are an example of a positive feedback system.