IB Biology Topic D3.3.2 Negative Feedback Loops in Homeostasis Revision Notes (SL/HL)

IB Biology Topic D3.3.2 Negative Feedback Loops in Homeostasis Revision Notes (SL/HL) | RevisionDojo

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Negative Feedback Loops Keep Variables Near a Set Point

Definition

Negative feedback loop

A negative feedback loop is a self-regulating system that detects changes in a variable and triggers responses to bring it back to a set point.

How a Negative Feedback Loop Works

A variable is held near its set point, the normal value the body aims to maintain.
When the variable moves away from the set point, the change is detected.
A response is triggered that reverses the change and moves the variable back toward the set point.
As the variable returns to the set point, the response switches off, so the system does not overshoot.

The output of the loop always opposes the original change, which is why it is called negative feedback.

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(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit

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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

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Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Negative Feedback Loops Keep Variables Near a Set Point

Definition

Negative feedback loop

A negative feedback loop is a self-regulating system that detects changes in a variable and triggers responses to bring it back to a set point.

How a Negative Feedback Loop Works

A variable is held near its set point, the normal value the body aims to maintain.
When the variable moves away from the set point, the change is detected.
A response is triggered that reverses the change and moves the variable back toward the set point.
As the variable returns to the set point, the response switches off, so the system does not overshoot.

The output of the loop always opposes the original change, which is why it is called negative feedback.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic D3.3.2: Negative Feedback Loops in Homeostasis Notes

Negative Feedback Loops Keep Variables Near a Set Point

How a Negative Feedback Loop Works

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Negative Feedback Loops Keep Variables Near a Set Point

How a Negative Feedback Loop Works

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics