Negative Feedback Mechanism Flashcards

Questions and Answers

What is a negative feedback mechanism?

A method that solely relies on positive reinforcement

An unchanging mechanism

A system that increases output without regulation

A type of self-regulating system that inhibits future production (correct)

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?

Deviation from a set point that is resisted to return to homeostasis.

What is the function of a sensor in a negative feedback mechanism?

To monitor a physiological value. Signup and view all the answers

What is the role of a control center in a negative feedback mechanism?

To compare the value to the normal range. Signup and view all the answers

What is the purpose of an effector in a negative feedback mechanism?

To cause a change that reverses the situation and returns the value to normal range. Signup and view all the answers

Give an example of a negative feedback loop.

Regulating body temperature to restore normal levels. Signup and view all the answers

In homeostasis, negative feedback acts as an opposition to a _____ that triggers them.

stimulus Signup and view all the answers

How does the body respond to an abnormally high temperature?

It activates negative feedback loops to lower the temperature towards the setpoint of 37°C. Signup and view all the answers

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.

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.