Final answer:
Positive feedback intensifies changes away from normal state, potentially leading to risks or activity blockage. Examples include childbirth, blood clotting, and environmental system amplification.
Explanation:
Positive feedback mechanism intensifies a change in the body's physiological condition rather than reversing it. It results in the system moving farther away from the normal state or equilibrium, leading to potential risks or total blocking of activities. Examples include childbirth, blood clotting, and the amplification effect in environmental systems.
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