3.1 Feedback Mechanisms

What is positive feedback in homeostasis?

• Positive feedback in homeostasis is a self-correcting mechanism that brings the body back to its normal range.

• Positive feedback in homeostasis is a mechanism that decreases the change or deviation from the normal range.

• Positive feedback in homeostasis is a mechanism that has no effect on the body's normal range.

• Positive feedback in homeostasis is a self-reinforcing mechanism that amplifies or increases the change or deviation from the normal range.

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Give an example of positive feedback in homeostasis.

• Shivering.

• Blood clotting.

• Sweating.

• Childbirth

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How does positive feedback affect the body's response to a stimulus?

• Inhibits

• Decreases

• Amplifies

• Neutralizes

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What is negative feedback in homeostasis?

• Regulatory mechanism that counteracts changes from the normal set point

• Process that has no effect on changes from the normal set point.

• Regulatory mechanism that promotes changes from the normal set point.

• Process that amplifies changes from the normal set point.

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Provide an example of negative feedback in homeostasis.

• Sweating

• Constriction of blood vessels

• Increased heart rate

• Shivering

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Explain how negative feedback helps maintain homeostasis.

• Negative feedback only occurs in certain body systems and does not contribute to overall homeostasis.

• Negative feedback counteracts changes and deviations from the desired set point to maintain homeostasis.

• Negative feedback has no effect on maintaining homeostasis.

• Negative feedback amplifies changes and deviations from the desired set point to maintain homeostasis.

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Describe the role of negative feedback in temperature regulation.

• Negative feedback in temperature regulation has no effect on body temperature.

• Negative feedback in temperature regulation causes changes in body temperature.

• Negative feedback in temperature regulation only occurs in extreme temperatures.

• Negative feedback in temperature regulation helps maintain homeostasis by counteracting changes in body temperature.

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How does positive feedback differ from negative feedback in homeostasis?

• Positive feedback decreases, while negative feedback increases.

• Positive feedback inhibits, while negative feedback promotes.

• Positive feedback amplifies, while negative feedback counteracts.

• Positive feedback stabilizes, while negative feedback disrupts.

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Why is it important for the body to have both positive and negative feedback mechanisms?

• To disrupt homeostasis and cause dysfunction in the body.

• To only have positive feedback mechanisms and ignore negative feedback.

• To rely solely on negative feedback mechanisms and ignore positive feedback.

• To maintain homeostasis and ensure proper body function.

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What is homeostasis?

• the process of maintaining relatively stable internal conditions

• All the physical and chemical changes occurring in an organism

• the process of becoming bigger

• Movement of substances throughout the body

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