Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
A positive feedback loop amplifies or increases changes; this tends to move a system away from its equilibrium state and make it more unstable.
Related terms
Childbirth (Oxytocin): During childbirth, oxytocin hormone causes contractions that become stronger and stronger – an example of positive feedback loop.
Blood clotting: When an injury occurs and bleeding begins, platelets start sticking together at wound site forming a clot – another example of positive feedback loop.
Lactation: The production and secretion of milk by mammary glands for feeding infants – also regulated by positive feedback mechanism.