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A negative feedback mechanism is a system to return a disruption in homeostasis back to homeostasis.

A positive feedback mechanism is a system to reinforce or perpetuate a disruption in homeostasis.

The oxyhemoglobin dissociation curve represents the Partial pressure in oxygen that will be saturated in the amount of hemoglobin.

This curve represents a positive feedback because the binding of Oxygen to hemoglobin facilitates more binding of oxygen to hemoglobin (you can see this in the rapid rise in saturation from 10-40 mm Hg) until it reaches 60 mm Hg where it is somewhat completely saturated

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What kind of feedback mechanism is it when it causes the initial stimulus to decline?

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To deter plagiarism the feedback mechanism is a punishment.


When the initial stimulus produces a response that reinforces the stimulus the mechanism is called?

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