Biology / Unit 12 Bio 2751 short lesson, about 20 seconds
Positive Feedback Loop
Captions available
The idea
A positive feedback loop amplifies a stimulus in its original direction rather than reversing it, and is rare in animal bodies compared with negative feedback.
In practice
Rising oxytocin during childbirth strengthens uterine contractions further, rather than damping them, until delivery is complete.
Where people slip
Positive feedback needs a natural endpoint built in, since nothing in the loop itself reverses the direction.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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