Final answer:
Positive and negative feedback loops are the two types of feedback loops in biology that either amplify or reduce a response.
Step-by-step explanation:
The two types of feedback loops are positive and negative feedback loops.
A positive feedback loop amplifies or increases a response, resulting in a self-reinforcing cycle. An example of a positive feedback loop is blood clotting. When a blood vessel is damaged, platelets release chemicals that attract more platelets to form a clot. As the clot grows, more platelets are recruited, leading to further clotting.
A negative feedback loop dampens or reduces a response, maintaining homeostasis. An example of a negative feedback loop is body temperature regulation. When body temperature exceeds a certain threshold, sweat glands are activated to release sweat, which cools the body down. As body temperature decreases, the sweat glands become less active, allowing the body to retain heat.
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