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Questions and Answers
What is a negative feedback mechanism?
What is a negative feedback mechanism?
What happens in a negative feedback mechanism when a substance's concentration rises?
What happens in a negative feedback mechanism when a substance's concentration rises?
The feedback causes the substance's content to reduce.
What is a stimulus in the context of negative feedback mechanisms?
What is a stimulus in the context of negative feedback mechanisms?
Deviation from a set point that is resisted to return to homeostasis.
What is the function of a sensor in a negative feedback mechanism?
What is the function of a sensor in a negative feedback mechanism?
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What is the role of a control center in a negative feedback mechanism?
What is the role of a control center in a negative feedback mechanism?
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What is the purpose of an effector in a negative feedback mechanism?
What is the purpose of an effector in a negative feedback mechanism?
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Give an example of a negative feedback loop.
Give an example of a negative feedback loop.
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In homeostasis, negative feedback acts as an opposition to a _____ that triggers them.
In homeostasis, negative feedback acts as an opposition to a _____ that triggers them.
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How does the body respond to an abnormally high temperature?
How does the body respond to an abnormally high temperature?
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Study Notes
Negative Feedback Mechanism
- A self-regulating system that maintains stability by inhibiting further production when output increases.
- Functions to restore physiological balance in response to changes.
Characteristics of Negative Feedback
- Causes a reduction in a substance's concentration when its levels rise.
- Essential for maintaining homeostasis within biological systems.
Major Components of Negative Feedback Mechanism
- Stimulus: A deviation from a set point that triggers a response aimed at returning the body to homeostasis.
- Sensor (Receptor): Monitors physiological values and detects changes in the environment or body.
- Control Center: Compares the detected value against the normal range to determine appropriate responses.
- Effector: Acts to reverse the deviation from normal, restoring balance within the system.
Example of Negative Feedback Loop
- Body temperature regulation:
- When body temperature rises above normal (37°C), sensors in the skin detect the increase.
- The control center in the brain processes this information and activates effectors, such as sweat glands.
- Sweating helps to lower body temperature back to the normal set point.
Negative Feedback in Homeostasis
- Functions to oppose stimuli, ensuring stable internal conditions.
- Vital for regulating physiological parameters, such as temperature, pH levels, and glucose concentrations.
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Description
Explore the concept of negative feedback mechanisms through these informative flashcards. Understand how self-regulating systems function and learn how increased output can inhibit future production. Perfect for students seeking to grasp this essential biological principle.
