Feedback Inhibition

What is negative feedback in the context of feedback inhibition?

• A process where the end product of a metabolic pathway stimulates an earlier step in the pathway

• Regulatory mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathway, reducing the production of the end product.

• A regulatory mechanism that increases the production of the end product in a metabolic pathway

• The complete inhibition of all metabolic pathways in a cell

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Provide an example of negative feedback in biological systems.

• Decrease in blood sugar levels triggering the release of insulin to bring levels back to normal

• Increase in blood sugar levels triggering the release of adrenaline to lower the sugar levels

• Decrease in blood sugar levels triggering the release of glucagon to lower the sugar levels further

• Increase in blood sugar levels triggering the release of insulin to bring levels back to normal

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How does negative feedback help in maintaining homeostasis?

• By promoting rapid changes in the body's functions

• By reversing any deviation from the set point and stabilizing the internal environment.

• By causing further deviation from the set point

• By destabilizing the internal environment

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Explain the concept of positive feedback in feedback inhibition.

• Feedback inhibition occurs when a product of a reaction inhibits the enzyme that catalyzes the reaction

• Positive feedback leads to a decrease in the production of a substance

• The end product of a metabolic pathway stimulates its own production

• The end product of a metabolic pathway inhibits its own production

Give an example of positive feedback in biological processes.

• Release of oxytocin during childbirth

• Release of cortisol in response to stress

• Release of insulin in response to high blood sugar levels

• Release of adrenaline during fight or flight response

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What is the role of positive feedback in amplifying a response?

• Positive feedback only works in the opposite way, reducing the response.

• Positive feedback increases the initial stimulus, leading to a greater output.

• Positive feedback decreases the initial stimulus, leading to a smaller output.

• Positive feedback has no impact on the initial stimulus or output.

Compare and contrast negative and positive feedback mechanisms.

• Positive feedback mechanisms reverse deviations from the set point

• Negative feedback mechanisms amplify deviations from the set point

• Negative feedback mechanisms have no effect on deviations from the set point

• Negative feedback mechanisms reverse deviations from the set point, while positive feedback mechanisms amplify deviations from the set point.

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How do negative and positive feedback work together in regulating physiological processes?

• Negative feedback and positive feedback have no impact on regulating physiological processes.

• Negative and positive feedback work together to maintain homeostasis by regulating physiological processes.

• Negative feedback and positive feedback work independently and do not interact in regulating physiological processes.

• Negative feedback inhibits the physiological processes, while positive feedback enhances them.

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Discuss the significance of feedback inhibition in biological systems.

• Feedback inhibition helps regulate and control the metabolic pathways in cells.

• Feedback inhibition leads to uncontrolled and chaotic metabolic pathways

• Feedback inhibition has no impact on biological systems

• Feedback inhibition only occurs in non-living organisms

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Explain how feedback inhibition is relevant in the context of enzyme regulation.

• Feedback inhibition promotes the overproduction of a particular product.

• Feedback inhibition has no impact on enzyme activity.

• Feedback inhibition helps to regulate enzyme activity by preventing the overproduction of a particular product.

• Feedback inhibition only occurs in non-essential metabolic pathways.

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