Biology / Unit 12 Bio 2755 short lesson, about 20 seconds
Positive Feedback Is Self-Limiting by Design
Captions available
The idea
A healthy positive feedback loop, per Bio 2751, runs only until an event — childbirth, a formed clot — halts it, not to a runaway extreme.
In practice
Uterine contractions escalate under oxytocin, per Bio 2751, but delivery removes the stimulus that sustained the loop.
Where people slip
"Positive feedback means malfunction," per Bio 2753, ignores that the endpoint is built into the trigger.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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