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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
  • Homeostasis

    The maintenance of the body’s internal environment.

  • 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.

  • Integrator

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

  • Effectors

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