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Positive and Negative Feedback
Next Generation: HS.LS1.3 NGSS

Positive and Negative Feedback

Author: Aaron Mullally
Description:

This lesson will explain in detail positive feedback as a control mechanism of homeostasis.

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Tutorial

Negative and Positive Feedback Loops

Source: Aaron M

Notes on Negative and Positive Feedback Loops

Overview

(00:00 – 1:46) Key Terms

(1:47 – 3:34) Feedback Loop Overview

(3:35 – 7:07) Negative Feedback Loops

(7:08 – 9:12) Positive Feedback Loops

Source: Aaron Mullally

Terms to Know
Effectors

Glands or muscles that carry out the response as designated by the integrator.

Homeostasis

The maintenance of the body’s internal environment.

Integrator

The main integrator in the body is the brain. The integrator receives signals from sensory receptors and determines an appropriate response.

Negative Feedback

A mechanism in which a change in the body is detected and then reversed to maintain homeostasis.

Positive Feedback

A mechanism in which a change in the body is detected and then intensified.

Sensory Receptor

Receptors that detect a stimulus or change in the body.