IB Biology Topic D3.3.5 Thermoregulation as an Example of Negative Feedback Control Revision Notes (SL/HL)

IB Biology Topic D3.3.5 Thermoregulation as an Example of Negative Feedback Control Revision Notes (SL/HL) | RevisionDojo

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Thermoregulation Keeps Core Temperature Near 37 Degrees Celsius

Step into a freezing room and your body starts to shiver almost at once.
That response is not random, it is part of thermoregulation, the control of body temperature.
Thermoregulation is a clear example of negative feedback holding a variable close to a fixed target.

Definition

Thermoregulation

Thermoregulation is the process by which organisms maintain their core body temperature within a narrow range, typically around 37°C in humans.

A Stable Core Temperature Protects Enzyme Activity

The body defends a set point of about 37 degrees Celsius.
This matters because enzymes work best within a narrow temperature range.
Too cold and reactions slow, too hot and enzymes denature, so metabolism depends on holding this balance.

Note

Negative feedback reverses any deviation and returns the variable toward its set point.
In thermoregulation the variable being controlled is core body temperature.

The Feedback Loop Detects, Compares, and Corrects Temperature

Negative feedback controls temperature through three linked components.

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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.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Thermoregulation Keeps Core Temperature Near 37 Degrees Celsius

Step into a freezing room and your body starts to shiver almost at once.
That response is not random, it is part of thermoregulation, the control of body temperature.
Thermoregulation is a clear example of negative feedback holding a variable close to a fixed target.

Definition

Thermoregulation

Thermoregulation is the process by which organisms maintain their core body temperature within a narrow range, typically around 37°C in humans.

A Stable Core Temperature Protects Enzyme Activity

The body defends a set point of about 37 degrees Celsius.
This matters because enzymes work best within a narrow temperature range.
Too cold and reactions slow, too hot and enzymes denature, so metabolism depends on holding this balance.

Note

Negative feedback reverses any deviation and returns the variable toward its set point.
In thermoregulation the variable being controlled is core body temperature.

The Feedback Loop Detects, Compares, and Corrects Temperature

Negative feedback controls temperature through three linked components.

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 D3.3.5: Thermoregulation as an Example of Negative Feedback Control Notes

Thermoregulation Keeps Core Temperature Near 37 Degrees Celsius

A Stable Core Temperature Protects Enzyme Activity

The Feedback Loop Detects, Compares, and Corrects Temperature

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

Thermoregulation Keeps Core Temperature Near 37 Degrees Celsius

A Stable Core Temperature Protects Enzyme Activity

The Feedback Loop Detects, Compares, and Corrects Temperature

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