Positive feedback loops
A feedback loop in which change in a system is amplified
Negative feedback loop
when a system responds to a change by returning to its original state
Positive feedback loop
blood clotting, child birth
Negative feedback loops
temperature control, blood sugar levels
Internal stable environment
Negative feedback loops: What happens when a human's internal temperature increases?
We sweat and blood rises to the surface of the head
Negative feedback loops: What happens when a human's internal temperature decreases?
We get goosebumps ( pulling our skin in)
Biological systems use to both maintain homeostasis and to amplify, or increase, the sending of a biological signal
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