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OCR A Biology

Change Head Cervix Oxytocin Positve Feedback Internal Enviro

Positive feedback reinforces an initial stimulus, increasing the response, as seen in blood clotting and childbirth.

O feedback positivo reforça um estímulo inicial, aumentando a resposta, como observado na coagulação sanguínea e no parto.

Front Positve feedback
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  • Change in internal enviro detected by sensory receptors and effectors reinforce that change and increase response
  • Examples include blood clotting cascade (platelets bind to damaged region and release facors initiating clotiing and attract more platelets) and childbirth (baby head pushes against cervix, oxytocin forms and stimulates uturus contraction, pushing head even harder against cervix, which releases more oxytocin until child born)

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