Feedback Loops

Presentation

•

Biology

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9th - 10th Grade

•

Medium

•

NGSS

HS-LS1-3

Standards-aligned

Michelle Wagner

Used 25+ times

FREE Resource

4 Slides • 4 Questions

Feedback Loops

Maintaining Homeostasis

Negative Feedback Loops

causes a decrease in function
the feedback tends to stabilize the system
occurs in response to some kind of stimulus
can be referred to as homeostasis, as in biology

Example of Negative Feedback

Control of blood sugar (glucose) by insulin is a good example of a negative feedback mechanism. When blood sugar rises, receptors in the body sense a change. In turn, the control center (pancreas) secretes insulin into the blood effectively lowering blood sugar levels.

Positive Feedback

occurs in nature when the product of a reaction leads to an increase in that reaction
in homeostasis, a positive feedback loop moves a system further away from the target of equilibrium
Example, ripening of fruit or childbirth

Multiple Choice

What is NOT true about a Negative Feedback Loop?

moves a system further away from the target of equilibrium

a reaction that causes a decrease in function

causes the output of a system to be lessened

tends to stabilize the system

Multiple Choice

What is an example of Negative Feedback?

Childbirth

Fruit Ripening

Blood Glucose Regulation

Multiple Choice

What is TRUE about Positive Feedback?:

causes a decrease in function

moves a system further away from the target of equilibrium

causes the output of a system to be lessened

Multiple Choice

What is an example of Positive Feedback?

Temperature Regulation

Blood Glucose Regulation

Fruit Ripening

Feedback Loops

Maintaining Homeostasis

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