HP 23-24 Feedback Loops

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What is a Positive Feedback Loop?

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A process where an initial change leads to further changes in the same direction, amplifying the effect. Example: In an advertisement, more clicks lead to more visibility, resulting in even more clicks.

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What is a Negative Feedback Loop?

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A process that counteracts a change, leading to a decrease in the effect. Example: When blood sugar rises, insulin is released to lower it back to normal levels.

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How does a Positive Feedback Loop function in biological systems?

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It enhances a response until a specific outcome is achieved. Example: During blood clotting, platelets release hormones that attract more platelets.

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How does a Negative Feedback Loop function in biological systems?

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It maintains homeostasis by reversing a change. Example: The body regulates temperature by sweating when overheated.

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What role do hormones play in feedback loops?

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Hormones act as signals that trigger responses in the body, either amplifying (positive feedback) or counteracting (negative feedback) changes.

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Can you give an example of a Positive Feedback Loop in nature?

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An example is the melting of polar ice; as ice melts, it exposes darker ocean water, which absorbs more heat and causes more ice to melt.

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Can you give an example of a Negative Feedback Loop in nature?

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An example is the regulation of body temperature; when the body gets too hot, mechanisms like sweating are activated to cool it down.

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What is the significance of feedback loops in ecosystems?

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Feedback loops help maintain balance and stability within ecosystems, influencing population dynamics and resource availability.

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How do feedback loops relate to climate change?

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Feedback loops can either exacerbate or mitigate climate change effects, such as increased greenhouse gases leading to higher temperatures.

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What is the difference between a feedback loop and a feedback response?

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A feedback loop refers to the ongoing process of feedback, while a feedback response is a specific action taken as a result of feedback.